Run 4 for https://vi.wikipedia.org/wiki/Vincent_van

Summary

Metric	Value
Page metrics
Performance score	76
Total page size	1.6 MB
Requests	97
Timing metrics
TTFB	507 ms
First Paint	1.083 s
Fully Loaded	2.550 s
Google Web Vitals
TTFB	507 ms
First Contentful Paint (FCP)	1.083 s
Largest Contentful Paint (LCP)	1.083 s
Cumulative Layout Shift (CLS)	0.03
CPU metrics
CPU long tasks	1
CPU last long task happens at	732 ms
Visual Metrics
First Visual Change	1.100 s
Speed Index	1.515 s
Visual Complete 85%	1.100 s
Visual Complete 99%	12.666 s
Last Visual Change	12.700 s

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| Waterfall | | Download HAR |

Waterfall

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| Video | Download |

Video

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| Filmstrip |

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

0.8 sCPU Long Task duration 284 ms

1.1 sDOM Content Loaded Time 1.047 smwStartup 1.050 sFirst Contentful Paint 1.083 sLCP <P> 1.083 sFirst Visual Change 1.100 sVisual Complete 85% 1.100 s

1.2 sVisual Complete 95% 1.133 s

1.5 s

1.8 sLayout Shift 0.00000 1.736 s

2 s

2.1 sLayout Shift 0.03330 2.038 sLargest Image 2.100 sHeading 2.100 s

2.2 s

2.3 s

2.4 s

2.5 sPage Load Time 2.437 sLayout Shift 0.00012 2.450 s

2.6 sFully Loaded 2.550 s

9.5 s

9.8 s

9.9 s

10 s

12.2 s

12.3 s

12.4 s

12.5 s

12.6 s

12.7 sVisual Complete 99% 12.666 sLast Visual Change 12.700 s

Coach

The coach helps you find performance problems on your web page using web performance best practice rules. And gives you advice on privacy and best practices. Tested using Coach-core version 8.0.2.

Coach score

Total score 82
Performance score 76
Privacy score 88
Best practice score 88

Performance advice (76)

Title

Advice

Score

Avoid slowing down the critical rendering path (avoidRenderBlocking)

The page has 3 blocking requests and 0 in body parser blocking (0 JavaScript and 3 CSS). There are 1 potentially render blocking requests. You need to verify if it is render blocking: https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022

Description: The critical rendering path is what the browser needs to do to start rendering the page. Every file requested inside of the head element will postpone the rendering of the page, because the browser need to do the request. Avoid loading JavaScript synchronously inside of the head (you should not need JavaScript to render the page), request files from the same domain as the main document (to avoid DNS lookups) and inline CSS for really fast rendering and a short rendering path.

Offenders:

https://vi.wikipedia.org/w/load.php...ia.org/w/load.php

Don't scale images in the browser (avoidScalingImages)

The page has 1 image that are scaled more than 100 pixels. It would be better if those images are sent so the browser don't need to scale them.

Description: It's easy to scale images in the browser and make sure they look good in different devices, however that is bad for performance! Scaling images in the browser takes extra CPU time and will hurt performance on mobile. And the user will download extra kilobytes (sometimes megabytes) of data that could be avoided. Don't do that, make sure you create multiple version of the same image server-side and serve the appropriate one.

Offenders:

https://vi.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg

Inline CSS for faster first render (inlineCss)

The page has both inline CSS and CSS requests even though it uses a HTTP/2-ish connection. If you have many users on slow connections, it can be better to only inline the CSS. Run your own tests and check the waterfall graph to see what happens.

Description: In the early days of the Internet, inlining CSS was one of the ugliest things you can do. That has changed if you want your page to start rendering fast for your user. Always inline the critical CSS when you use HTTP/1 and HTTP/2 (avoid doing CSS requests that block rendering) and lazy load and cache the rest of the CSS. It is a little more complicated when using HTTP/2. Does your server support HTTP push? Then maybe that can help. Do you have a lot of users on a slow connection and are serving large chunks of HTML? Then it could be better to use the inline technique, becasue some servers always prioritize HTML content over CSS so the user needs to download the HTML first, before the CSS is downloaded.

Avoid CPU Long Tasks (longTasks)

The page has 1 CPU long task with the total of 284 ms. The total blocking time is 0 ms and 1 long task before first contentful paint with total time of 284 ms. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. Use Geckoprofiler for Firefox or Chromes tracelog to debug your long tasks.

Description: Long CPU tasks locks the thread. To the user this is commonly visible as a "locked up" page where the browser is unable to respond to user input; this is a major source of bad user experience on the web today. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. To debug you should use the Chrome timeline log and drag/drop it into devtools or use Firefox Geckoprofiler.

Offenders:

unknown

Avoid doing redirects (assetsRedirects)

The page has 1 redirect. 1 of the redirects are from the base domain, please fix them!

Description: A redirect is one extra step for the user to download the asset. Avoid that if you want to be fast. Redirects are even more of a showstopper on mobile.

Offenders:

https://vi.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script

Avoid extra requests by setting cache headers (cacheHeaders)

The page has 74 requests that are missing a cache time. Configure a cache time so the browser doesn't need to download them every time. It will save 987.8 kB the next access.

Description: The easiest way to make your page fast is to avoid doing requests to the server. Setting a cache header on your server response will tell the browser that it doesn't need to download the asset again during the configured cache time! Always try to set a cache time if the content doesn't change for every request.

Offenders:

https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/1000_b%C3%A0i_c%C6%A1_...E1%BA%A3n.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Symbol_star_gold.svg/1...star_gold.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Vincent_van_Gogh_-_Sel..._%28454045%29.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Vincent_van_Gogh_signa...incent%29.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Speaker_Icon.svg/13px-Speaker_Icon.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/d/d3/Vincent_van_Gogh_Janua...28restored%29.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Theo_van_Gogh_May_1878...28restored%29.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/1/12/Famille_van_Gogh.JPG/2...ille_van_Gogh.JPG

https://upload.wikimedia.org/wikipedia/commons/thumb/7/74/VincentVanGoghFoto.jpg...ntVanGoghFoto.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/4/48/Cuesmes_JPG001.jpg/220...uesmes_JPG001.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Vincent_Willem_van_Gog..._van_Gogh_016.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/a/af/Vincent_Van_Gogh_-_The...Potato_Eaters.png

https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Paris_rue_lepic_54.jpg..._rue_lepic_54.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Vincent_Willem_van_Gog...t_%28Yorck%29.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/VanGogh-starry_night.j...-starry_night.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Toulouse-Lautrec_de_He..._van_Gogh_Sun.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Vincent_van_Gogh_-_Sta...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/0/0b/Jean-Fran%C3%A7ois_Mil..._%28II%29_013.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/Tsunami_by_hokusai_19t..._19th_century.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Vincent_Willem_van_Gog..._van_Gogh_098.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Vincent_Willem_van_Gog..._van_Gogh_059.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/Van_Gogh_-_Bildnis_der...C3%BCnstlers.jpeg

https://upload.wikimedia.org/wikipedia/commons/thumb/3/3c/Vincent_van_Gogh_-_Eug...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Vincent_van_Gogh_-_Por...Joseph_Roulin.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/d/d2/Vincent_Willem_van_Gog..._van_Gogh_084.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Vincent_van_Gogh_-_Sel...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Vincent_van_Gogh_-_Sel...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/a/a8/Van_Gogh_Self-Portrait...-Metropolitan.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/1/18/Vincent_van_Gogh_-_Sel..._%28719161%29.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/7/71/Vincent_Willem_van_Gog..._van_Gogh_102.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/4/46/Vincent_Willem_van_Gog..._van_Gogh_127.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Vincent_Willem_van_Gog..._van_Gogh_128.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Irises-Vincent_van_Gog...cent_van_Gogh.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Vincent_van_Gogh_-_Alm...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/3/33/Vincent_van_Gogh_-_Iri...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Van_Gogh_-_Vase_of_Ros...Vase_of_Roses.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/7/75/Vincent_van_Gogh_-_Roa...2-15_May_1890.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Van_Gogh_The_Olive_Tre..._Olive_Trees..jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/d/de/Van_Gogh_Starry_Night_...Night_Drawing.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Van_Gogh_-_Zypressen_m...chen_Figuren.jpeg

https://upload.wikimedia.org/wikipedia/commons/thumb/6/63/Vincent_van_Gogh_-_Whe...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Vincent_Van_Gogh_0016....Van_Gogh_0016.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Vincent_Willem_van_Gog..._van_Gogh_014.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Vincent_van_Gogh_-_De_...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Van_Gogh_-_Bl%C3%BChen...ssen_umgeben.jpeg

https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/Vincent_Van_Gogh_0018....Van_Gogh_0018.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/9/98/Vincent_van_Gogh_-_Whe...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Vincent_Willem_van_Gog..._van_Gogh_007.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Vincent_Willem_van_Gog...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Landscape_with_wheat_s...d_rising_moon.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Vincent_van_Gogh_-_Hou...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/b/ba/Vincent_van_Gogh_-_Whe...e_Art_Project.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Van_Gogh_-_Still_Life_...with_Absinthe.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Grave_of_Vincent_van_G...cent_van_Gogh.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Portrait_of_Dr._Gachet...of_Dr._Gachet.jpg

https://upload.wikimedia.org/wikipedia/commons/thumb/7/77/Open_Access_logo_PLoS_...ansparent.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/2...ary_small.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/25px...news-logo.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/21p...uote-logo.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/24...urce-logo.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikibooks-logo.svg/25p...ooks-logo.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Wikiversity-logo-en.sv...y-logo-en.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Speaker_Icon.svg/20px-Speaker_Icon.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Flag_of_the_Netherland...therlands.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-...ogressive.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Symbol_star_gold.svg/6...star_gold.svg.png

https://vi.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script

https://upload.wikimedia.org/wikipedia/commons/f/f9/Closewindow14x14.png

https://meta.wikimedia.org/w/index.php...a.org/w/index.php

https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn?wikiid=viwiki&type=script

https://upload.wikimedia.org/wikipedia/commons/thumb/5/55/WMA_button2b.png/17px-WMA_button2b.png

https://upload.wikimedia.org/wikipedia/commons/b/b5/Button_resize.png

https://upload.wikimedia.org/wikipedia/commons/d/d4/Button_hide.png

Long cache headers is good (cacheHeadersLong)

The page has 5 requests that have a shorter cache time than 30 days (but still a cache time).

Description: Setting a cache header is good. Setting a long cache header (at least 30 days) is even better beacause then it will stay long in the browser cache. But what do you do if that asset change? Rename it and the browser will pick up the new version.

Offenders:

https://vi.wikipedia.org/w/load.php...ia.org/w/load.php

https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022

https://vi.wikipedia.org/w/load.php...ia.org/w/load.php

https://vi.wikipedia.org/w/load.php?lang=vi&modules=site.styles&only=styles&skin=vector-2022

https://vi.wikipedia.org/w/api.php...dia.org/w/api.php

Total image size shouldn't be too big (imageSize)

The page total image size is 960.7 kB. It's really big. Is the page using the right format for the images? Can they be lazy loaded? Are they compressed as good as they can be? Make them smaller by using https://imageoptim.com/.

Description: Avoid having too many large images on the page. The images will not affect the first paint of the page, but it will eat bandwidth for the user.

Total JavaScript size shouldn't be too big (javascriptSize)

The total JavaScript transfer size is 470.1 kB and the uncompressed size is 1.8 MB. This is totally crazy! There is really room for improvement here.

Description: A lot of JavaScript often means you are downloading more than you need. How complex is the page and what can the user do on the page? Do you use multiple JavaScript frameworks?

Offenders:

URL	Transfer size	Content size
https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022	19.5 KB	58.4 KB
https://vi.wikipedia.org/w/load.php...ia.org/w/load.php	26.5 KB	83.4 KB
https://vi.wikipedia.org/w/load.php...ia.org/w/load.php	17.2 KB	58.2 KB
https://vi.wikipedia.org/w/load.php...ia.org/w/load.php	281.0 KB	1.1 MB
https://vi.wikipedia.org/w/load.php...ia.org/w/load.php	25.3 KB	121.5 KB
https://vi.wikipedia.org/w/load.php...ia.org/w/load.php	2.7 KB	14.8 KB
https://vi.wikipedia.org/w/load.php...ia.org/w/load.php	74.1 KB	236.0 KB
https://meta.wikimedia.org/w/index.php...a.org/w/index.php	11.6 KB	26.9 KB
https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn?wikiid=viwiki&type=script	1.2 KB	252 B

Make each CSS response small (optimalCssSize)

https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.cite.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cmediawiki.page.gallery.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022 size is 23.4 kB (23419) and that is bigger than the limit of 14.5 kB. Try to make the CSS files fit into 14.5 KB.

Description: Make CSS responses small to fit into the magic number TCP window size of 14.5 KB. The browser can then download the CSS faster and that will make the page start rendering earlier.

Offenders:

URL	Transfer size	Content size
https://vi.wikipedia.org/w/load.php...ia.org/w/load.php	22.9 KB	180.9 KB

Don't use private headers on static content (privateAssets)

The page has 4 requests with private headers. The main page has a private header. It could be right in some cases where the user can be logged in and served specific content. But if your asset is static it should never be private. Make sure that the assets really should be private and only used by one user. Otherwise, make it cacheable for everyone.

Description: If you set private headers on content, that means that the content are specific for that user. Static content should be able to be cached and used by everyone. Avoid setting the cache header to private.

Offenders:

https://vi.wikipedia.org/wiki/Vincent_van_Gogh

https://vi.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script

https://meta.wikimedia.org/w/index.php...a.org/w/index.php

https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn?wikiid=viwiki&type=script

Best practice advice (88)

Title	Advice	Score
Meta description (metaDescription)	The page is missing a meta description.	0
Description: Use a page description to make the page more relevant to search engines.
Do not send too long headers (longHeaders)	https://vi.wikipedia...ia.org/w/load.php has a header sourcemap that is 1178 characters long.	99
Description: Do not send response headers that are too long.
Offenders: https://vi.wikipedia.org/w/load.php...ia.org/w/load.php
Avoid unnecessary headers (unnecessaryHeaders)	There are 19 responses that sets both a max-age and expires header. There are 97 responses that sets a server header.	0
Description: Do not send headers that you don't need. We look for p3p, cache-control and max-age, pragma, server and x-frame-options headers. Have a look at Andrew Betts - Headers for Hackers talk as a guide https://www.youtube.com/watch?v=k92ZbrY815c or read https://www.fastly.com/blog/headers-we-dont-want.
Offenders: https://vi.wikipedia.org/wiki/Vincent_van_Gogh https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022 https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022 https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php?lang=vi&modules=site.styles&only=styles&skin=vector-2022 https://vi.wikipedia.org/w/load.php?lang=vi&modules=site.styles&only=styles&skin=vector-2022 https://vi.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg https://vi.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg https://vi.wikipedia.org/static/images/icons/wikipedia.png https://vi.wikipedia.org/static/images/icons/wikipedia.png https://vi.wikipedia.org/static/images/mobile/copyright/wikipedia-tagline-vi.svg https://vi.wikipedia.org/static/images/mobile/copyright/wikipedia-tagline-vi.svg https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/1000_b%C3%A0i_c%C6%A1_...E1%BA%A3n.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Symbol_star_gold.svg/1...star_gold.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Vincent_van_Gogh_-_Sel..._%28454045%29.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Vincent_van_Gogh_signa...incent%29.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Speaker_Icon.svg/13px-Speaker_Icon.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/d/d3/Vincent_van_Gogh_Janua...28restored%29.jpg https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/load.php...ia.org/w/load.php https://vi.wikipedia.org/w/skins/Vector/resources/skins.vector.styles/images/arr...n-progressive.svg https://vi.wikipedia.org/w/resources/src/mediawiki.skinning/images/magnify-clip-ltr.svg?8330e https://vi.wikipedia.org/w/skins/Vector/resources/skins.vector.styles/images/lin...r-progressive.svg https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Theo_van_Gogh_May_1878...28restored%29.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/1/12/Famille_van_Gogh.JPG/2...ille_van_Gogh.JPG https://upload.wikimedia.org/wikipedia/commons/thumb/7/74/VincentVanGoghFoto.jpg...ntVanGoghFoto.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/4/48/Cuesmes_JPG001.jpg/220...uesmes_JPG001.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Vincent_Willem_van_Gog..._van_Gogh_016.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/a/af/Vincent_Van_Gogh_-_The...Potato_Eaters.png https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Paris_rue_lepic_54.jpg..._rue_lepic_54.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Vincent_Willem_van_Gog...t_%28Yorck%29.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/VanGogh-starry_night.j...-starry_night.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Toulouse-Lautrec_de_He..._van_Gogh_Sun.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Vincent_van_Gogh_-_Sta...e_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/0/0b/Jean-Fran%C3%A7ois_Mil..._%28II%29_013.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/Tsunami_by_hokusai_19t..._19th_century.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Vincent_Willem_van_Gog..._van_Gogh_098.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Vincent_Willem_van_Gog..._van_Gogh_059.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/Van_Gogh_-_Bildnis_der...C3%BCnstlers.jpeg https://upload.wikimedia.org/wikipedia/commons/thumb/3/3c/Vincent_van_Gogh_-_Eug...e_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Vincent_van_Gogh_-_Por...Joseph_Roulin.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/d/d2/Vincent_Willem_van_Gog..._van_Gogh_084.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Vincent_van_Gogh_-_Sel...e_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Vincent_van_Gogh_-_Sel...e_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/a/a8/Van_Gogh_Self-Portrait...-Metropolitan.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/1/18/Vincent_van_Gogh_-_Sel..._%28719161%29.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/7/71/Vincent_Willem_van_Gog..._van_Gogh_102.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/4/46/Vincent_Willem_van_Gog..._van_Gogh_127.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Vincent_Willem_van_Gog..._van_Gogh_128.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Irises-Vincent_van_Gog...cent_van_Gogh.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Vincent_van_Gogh_-_Alm...e_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/3/33/Vincent_van_Gogh_-_Iri...e_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Van_Gogh_-_Vase_of_Ros...Vase_of_Roses.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/7/75/Vincent_van_Gogh_-_Roa...2-15_May_1890.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Van_Gogh_The_Olive_Tre..._Olive_Trees..jpg https://upload.wikimedia.org/wikipedia/commons/thumb/d/de/Van_Gogh_Starry_Night_...Night_Drawing.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Van_Gogh_-_Zypressen_m...chen_Figuren.jpeg https://upload.wikimedia.org/wikipedia/commons/thumb/6/63/Vincent_van_Gogh_-_Whe...e_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Vincent_Van_Gogh_0016....Van_Gogh_0016.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Vincent_Willem_van_Gog..._van_Gogh_014.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Vincent_van_Gogh_-_De_...e_Art_Project.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Van_Gogh_-_Bl%C3%BChen...ssen_umgeben.jpeg https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/Vincent_Van_Gogh_0018....Van_Gogh_0018.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/9/98/Vincent_van_Gogh_-_Whe...e_Art_Project.jpg 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Privacy advice (88)

Title	Advice	Score
Use a good Content-Security-Policy header to make sure you you avoid Cross Site Scripting (XSS) attacks. (contentSecurityPolicyHeader)	Set a Content-Security-Policy header to make sure you are not open for Cross Site Scripting (XSS) attacks. You can start with setting a Content-Security-Policy-Report-Only header, that will only report the violation, not stop the download.	0
Description: Content Security Policy is delivered via a HTTP response header, and defines approved sources of content that the browser may load. It can be an effective countermeasure to Cross Site Scripting (XSS) attacks and is also widely supported and usually easily deployed. https://scotthelme.co.uk/content-security-policy-an-introduction/.
Offenders: https://vi.wikipedia.org/wiki/Vincent_van_Gogh
Set a referrer-policy header to make sure you do not leak user information. (referrerPolicyHeader)	Set a referrer-policy header to make sure you do not leak user information.	0
Description: Referrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites. https://scotthelme.co.uk/a-new-security-header-referrer-policy/.
Offenders: https://vi.wikipedia.org/wiki/Vincent_van_Gogh

Page info

Page info
Title	Vincent van Gogh – Wikipedia tiếng Việt
Generator	MediaWiki 1.44.0-wmf.3
Width	1904
Height	25018
DOM elements	6067
Avg DOM depth	14
Max DOM depth	23
Iframes	0
Script tags	5
Local storage	1.0 MB
Session storage	0 b
Network Information API	3g

Resource Hints
dns-prefetch
https://meta.wikimedia.org/
https://login.wikimedia.org/
preconnect
https://upload.wikimedia.org/

Technologies used to build the page.

Data collected using Wappalyzerversion 6.10.66. Use --browsertime.firefox.includeResponseBodies htmlor --browsertime.chrome.includeResponseBodies htmlto help Wappalyser find more information about technologies used.

Technology	Confidence	Category
MediaWiki	100	Wikis
PHP	100	Programming languages
Apache Traffic Server 9.2.5	100	Web servers
HSTS	100	Security

Visual Metrics

Visual Metrics
First Visual Change	1.100 s
Speed Index	1.515 s
Largest Image	2.100 s
Heading	2.100 s
LargestContentfulPaint	2.100 s
Last Meaningful Paint	2.100 s
Largest Contentful Paint	2.100 s
Visual Complete 85%	1.100 s
Visual Complete 95%	1.133 s
Visual Complete 99%	12.666 s
Last Visual Change	12.700 s
Visual Readiness	11.600 s

Browser Metrics

Navigation Timing
backEndTime	507 ms
domContentLoadedTime	1.047 s
domInteractiveTime	1.047 s
domainLookupTime	106 ms
frontEndTime	1.745 s
pageDownloadTime	185 ms
pageLoadTime	2.437 s
redirectionTime	0 ms
serverConnectionTime	202 ms
serverResponseTime	380 ms

Google Web Vitals
Time to first byte (TTFB)	507 ms
First Contentful Paint (FCP)	1.083 s
Largest Contentful Paint (LCP)	1.083 s
Cumulative Layout Shift (CLS)	0.03
Total Blocking Time (TBT)	0 ms

First Contentful Paint info
Elements that needed recalculate style before FCP	5565
Time spent in recalculate style before FCP	80.587 ms

Extra timings
TTFB	507 ms
First Paint	1.083 s
Load Event End	2.438 s
Fully loaded	2.550 s

User Timing marks
mwStartup	1.050 s

Largest Contentful Paint

When in time the page main content is rendered (collected using the Largest Contentful Paint API). Read more about Largest Contentful Paint.

Element type	P
Element/tag	<p></p>
Render time	1.083 s
Elements that needed recalculate style before LCP	5565
Time spent in recalculate style before LCP	80.587 ms
Load time	0 ms
*Size (widthheight)**	235500
DOM path
div:eq(1) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > p:eq(2)> div:eq(1) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > p:eq(2)>

The largest contentful paint is highlighted in the image. If no element is highlighted the element was removed before the screenshot or the LCP API couldn't find the element.

Detected Cumulative Layout Shift

0.03342 cumulative layout shift collected from the Cumulative Layout Shift API.

These HTML elements contribute most to the Cumulative Layout Shifts of the page. The higher score, the more layout shift.

Score	HTML Element
0.03330	<div class="vector-column-start"></div>,<div class="mw-content-container"></div>
body > div:eq(1) > div > div:eq(1),body > div:eq(1) > div > div:eq(2)
0.00012	<td style="vertical-align: top;"></td>
body > div:eq(1) > div > div:eq(0) > div#siteNotice > table#asn-dismissable-notice > tr > td:eq(1)
0.00000	<span class="vector-icon mw-ui-icon-wikimedia-expand"></span>,<span class="vector-icon mw-ui-icon-wikimedia-expand"></span>,<span class="vector-icon mw-ui-icon-wikimedia-expand"></span>,<span class="vector-icon mw-ui-icon-wikimedia-expand"></span>,<span class="vector-icon mw-ui-icon-wikimedia-expand"></span>
body > div:eq(1) > div > div:eq(1) > div:eq(1) > nav#mw-panel-toc > div#vector-toc-pinned-container > div#vector-toc > ul#mw-panel-toc-list > li#toc-Tiểu_sử > button > span:eq(0),body > div:eq(1) > div > div:eq(1) > div:eq(1) > nav#mw-panel-toc > div#vector-toc-pinned-container > div#vector-toc > ul#mw-panel-toc-list > li#toc-Sự_nghiệp > button > span:eq(0),body > div:eq(1) > div > div:eq(1) > div:eq(1) > nav#mw-panel-toc > div#vector-toc-pinned-container > div#vector-toc > ul#mw-panel-toc-list > li#toc-Phong_cách_và_tác_phẩm > button > span:eq(0),body > div:eq(1) > div > div:eq(1) > div:eq(1) > nav#mw-panel-toc > div#vector-toc-pinned-container > div#vector-toc > ul#mw-panel-toc-list > li#toc-Di_sản_và_đánh_giá > button > span:eq(0),body > div:eq(1) > div > div:eq(1) > div:eq(1) > nav#mw-panel-toc > div#vector-toc-pinned-container > div#vector-toc > ul#mw-panel-toc-list > li#toc-Tham_khảo > button > span:eq(0)

The elements that have shifted place is highlighted in the image (that have a higher value than 0.01). If the element shifted outside of the viewport, you will not see it there. It can be hard to understand what content that has shifted, if that's the case, checkout the video or the filmstrip of the run.

Long Animation Frames

Read more about the Long Animation Frames API here here.

The top 10 longest animation frames entries

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
243 ms	221.2 ms	283.8 ms	0.1 ms	283.7 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
36 ms	43.9 ms	44.1 ms	35.8 ms	8.3 ms
https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4309
https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022
Forced Style And Layout Duration: 9 ms Invoker: FrameRequestCallback Invoker Type: user-callback Source Function Name: flushCssBuffer Window attribution: self Source char position: 3231

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
7 ms	18.1 ms	47.9 ms	30.5 ms	17.4 ms
https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 251900

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
0 ms	8.6 ms	43.4 ms	40.2 ms	3.2 ms
https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022
Forced Style And Layout Duration: 5 ms Invoker: FrameRequestCallback Invoker Type: user-callback Source Function Name: flushCssBuffer Window attribution: self Source char position: 3231

Blocking duration

Work duration

Render duration

PreLayout Duration

Style And Layout Duration

0 ms

8.6 ms

43.4 ms

40.2 ms

3.2 ms

https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022

Forced Style And Layout Duration: 5 ms

Invoker: FrameRequestCallback
Invoker Type: user-callback
Source Function Name: flushCssBuffer
Window attribution: self
Source char position: 3231

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
0 ms	72.9 ms	14.1 ms	12.5 ms	1.6 ms
https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 251900
https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7
Forced Style And Layout Duration: 5 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 251900
https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 251900
https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 251900

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
0 ms	33.1 ms	26.9 ms	19.7 ms	7.2 ms
https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7
Forced Style And Layout Duration: 5 ms Invoker: XMLHttpRequest.onload Invoker Type: event-listener Window attribution: self Source char position: 336250
https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 251900
https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4309

Server timings

name	duration	description
cache	0	hit-front
host	0	cp3067

Custom metrics collected through JavaScript

There are no custom configured scripts.

Extra metrics collected using scripting

There are no custom extra metrics from scripting.

CDP Performance

name	value
AudioHandlers	0
AudioWorkletProcessors	0
Documents	14
Frames	11
JSEventListeners	814
LayoutObjects	8824
MediaKeySessions	0
MediaKeys	0
Nodes	12600
Resources	98
ContextLifecycleStateObservers	16
V8PerContextDatas	1
WorkerGlobalScopes	0
UACSSResources	0
RTCPeerConnections	0
ResourceFetchers	14
AdSubframes	0
DetachedScriptStates	2
ArrayBufferContents	0
LayoutCount	39
RecalcStyleCount	73
LayoutDuration	282
RecalcStyleDuration	208
DevToolsCommandDuration	70
ScriptDuration	292
V8CompileDuration	4
TaskDuration	1340
TaskOtherDuration	484
ThreadTime	2
ProcessTime	4
JSHeapUsedSize	7831448
JSHeapTotalSize	18632704
FirstMeaningfulPaint	1083

Visual Elements

Name	Display Time	X	Y	Width	Height
LargestImage (220px-Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project_%28454045%29.jpg)	2.100 s	1161	427	220	278
<img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project_%28454045%29.jpg/220px-Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project_%28454045%29.jpg" decoding="async" width="220" height="278" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project_%28454045%29.jpg/330px-Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project_%28454045%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project_%28454045%29.jpg/440px-Vincent_van_Gogh_-_Self-Portrait_-_Google_Art_Project_%28454045%29.jpg 2x" data-file-width="4747" data-file-height="6000">
Heading	2.100 s	478	180	792	40
<h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
LargestContentfulPaint	2.100 s	478	634	948	384
<p></p>

PageXray

How the page is built.

Summary
HTTP version	HTTP/2.0
Total requests	97
Total domains	4
Total transfer size	1.6 MB
Total content size	3.4 MB
Responses missing compression	14
Number of cookies	2
Third party cookies	0

Requests per response code
200	96
302	1

Largest assets on the page (by transfer size)

URL	Type	Transfer Size	Content Size
https://vi.wikipedia...ia.org/w/load.php	javascript	281.0 KB	1.1 MB
https://vi.wikipedia.../Vincent_van_Gogh	html	106.1 KB	560.9 KB
https://upload.wikim...Potato_Eaters.png	image	89.1 KB	88.1 KB
https://vi.wikipedia...ia.org/w/load.php	javascript	74.1 KB	236.0 KB
https://upload.wikim...2-15_May_1890.jpg	image	35.7 KB	34.8 KB
https://upload.wikim...of_Dr._Gachet.jpg	image	32.9 KB	32.0 KB
https://upload.wikim..._van_Gogh_098.jpg	image	32.1 KB	31.2 KB
https://upload.wikim...t_%28Yorck%29.jpg	image	31.9 KB	31.0 KB
https://upload.wikim..._%28454045%29.jpg	image	30.0 KB	29.1 KB
https://upload.wikim...with_Absinthe.jpg	image	27.3 KB	26.4 KB
https://upload.wikim..._rue_lepic_54.jpg	image	26.8 KB	26.0 KB
https://vi.wikipedia...ia.org/w/load.php	javascript	26.5 KB	83.4 KB
https://upload.wikim...cent_van_Gogh.jpg	image	26.5 KB	25.6 KB
https://vi.wikipedia...ia.org/w/load.php	javascript	25.3 KB	121.5 KB
https://upload.wikim...e_Art_Project.jpg	image	24.0 KB	23.1 KB
https://upload.wikim..._van_Gogh_014.jpg	image	24.0 KB	23.1 KB
https://vi.wikipedia...ia.org/w/load.php	css	22.9 KB	180.9 KB
https://upload.wikim...-starry_night.jpg	image	22.8 KB	21.9 KB
https://upload.wikim...uesmes_JPG001.jpg	image	19.6 KB	18.8 KB
https://upload.wikim..._Olive_Trees..jpg	image	19.6 KB	18.8 KB

Requests and sizes per content type

Content	Transfer Size	Content Size	Requests
html	106.1 KB	560.9 KB	1
css	31.8 KB	209.8 KB	3
javascript	459.1 KB	1.7 MB	9
image	974.9 KB	912.4 KB	73
svg	15.7 KB	25.8 KB	8
json	4.0 KB	13.7 KB	1
favicon	1.7 KB	2.7 KB	1
Total	1.6 MB	3.4 MB	96

Data per domain

Domain	Total download time	Transfer Size	Content Size	Requests
vi.wikipedia.org	5.050 s	628.8 KB	2.5 MB	24
upload.wikimedia.org	77.148 s	951.8 KB	890.7 KB	71
meta.wikimedia.org	251 ms	11.6 KB	26.9 KB	1
login.wikimedia.org	327 ms	1.2 KB	252 B	1

Expires and last modified statistics

type	min	median	max
Expires	0 seconds	0 seconds	1 year
Last modified	2 hours	2 years	11 years

Console log

The page logs the following messages to the console.

Level	Message
WARNING	https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022 11:274 "This page is using the deprecated ResourceLoader module \"jquery.ui\".\nPlease use Codex instead."
WARNING	https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022 11:274 "This page is using the deprecated ResourceLoader module \"mediawiki.Uri\".\n[1.43] Please use browser native URL."
WARNING	https://vi.wikipedia.org/wiki/Vincent_van_Gogh - The resource https://vi.wikipedia.org/static/images/project-logos/viwiki.png was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally.

Requests loaded after onLoad event

Included requests done after load event end.

Content	Transfer Size	Requests
html	0 b	0
css	0 b	0
javascript	0 b	0
image	0 b	0
font	0 b	0
favicon	1.7 KB	1
Total	1.7 KB	1

Requests loaded after onContentLoad

Includes requests done after DOM content loaded.

Content	Transfer Size	Requests
html	0 b	0
css	0 b	0
javascript	439.6 KB	8
image	14.9 KB	5
font	0 b	0
json	4.0 KB	1
favicon	1.7 KB	1
Total	460.2 KB	16

Render blocking requests

Render blocking information directly from Chrome.

Blocking	In body parser blocking	Potentially blocking
3	0	1

Render information

URL	Type
https://vi.wikipedia...ia.org/w/load.php	non_blocking
https://vi.wikipedia...ia.org/w/load.php	non_blocking
https://vi.wikipedia...ia.org/w/load.php	non_blocking
https://vi.wikipedia...ia.org/w/load.php	non_blocking
https://vi.wikipedia...ia.org/w/load.php	blocking
https://vi.wikipedia...ia.org/w/load.php	potentially_blocking
https://vi.wikipedia...ia.org/w/load.php	non_blocking
https://meta.wikimed...a.org/w/index.php	non_blocking
https://vi.wikipedia...-logos/viwiki.png	non_blocking
https://vi.wikipedia...ia.org/w/load.php	blocking
https://vi.wikipedia...ia.org/w/load.php	non_blocking
https://login.wikime...gin/checkLoggedIn	non_blocking
https://vi.wikipedia...ia.org/w/load.php	blocking
https://vi.wikipedia...alAutoLogin/start	non_blocking

CPU Long Tasks | CPU Time Spent | CPU Time Spent Per Request |

CPU

Download the Chrome trace log and drag and drop it into Developer Tools / Performance in Chrome.

Download trace log

Long Tasks

Collected using the Long Task API. A long task is a task that take 50 milliseconds or more.

Type	Quantity	Total duration (ms)
Total Blocking Time		0
Max Potential First Input Delay		0
Long Tasks before First Paint	1	284
Long Tasks before First Contentful Paint	1	284
Long Tasks before Largest Contentful Paint	1	284
Long Tasks after Load Event End	0	0
Total Long Tasks	1	284

CPU last long task happened at 732 ms

Individual Long Tasks

name	startTime	duration	containerId	containerName	containerSrc	containerType
unknown	732	284				window

CPU time spent

Calculated using Tracium.

Categories (ms)
parseHTML	40
styleLayout	492
paintCompositeRender	72
scriptParseCompile	4
scriptEvaluation	295
garbageCollection	13
other	383

Events (ms)
Layout	283
FunctionCall	249
UpdateLayoutTree	208
RunTask	176
PrePaint	128
Paint	64
ParseHTML	35
Layerize	31
v8.run	17
CpuProfiler::StartProfiling	16
RunMicrotasks	12

Time spent per request

URL	CPU time (ms)
https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022	262
https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7	155

URL

CPU time (ms)

https://vi.wikipedia.org/w/load.php?lang=vi&modules=startup&only=scripts&raw=1&skin=vector-2022

262

https://vi.wikipedia.org/w/load.php?lang=vi&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.scribunto.logs%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%2Cui%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Coojs-ui.styles.icons-interactions%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.sidebar.tracking&skin=vector-2022&version=1xix7

155

| afterPageCompleteCheck.jpg | layoutShift.jpg | largestContentfulPaint.jpg |

Screenshots

afterPageCompleteCheck.jpg

layoutShift.jpg

largestContentfulPaint.jpg

Run 4 summary

https://vi.wikipedia.org/wiki/Vincent_van_Gogh

Summary

Waterfall

Video

Filmstrip

Coach

Coach score

Performance advice (76)

Best practice advice (88)

Privacy advice (88)

Page info

Technologies used to build the page.

Visual Metrics

Browser Metrics

Largest Contentful Paint

Detected Cumulative Layout Shift

Long Animation Frames

Server timings

Custom metrics collected through JavaScript

Extra metrics collected using scripting

CDP Performance

Visual Elements

PageXray

Largest assets on the page (by transfer size)

Requests and sizes per content type

Data per domain

Expires and last modified statistics

Console log

Requests loaded after onLoad event

Requests loaded after onContentLoad

Render blocking requests

Render information

CPU

Long Tasks

Individual Long Tasks

CPU time spent

Time spent per request

Screenshots