Tested 2026-03-28 03:26:31 using Chrome 146.0.7680.80 (script).(runtime settings).
Test as a logged in userLogin the user with an empty browser cache, then visit Obama and Facebook
| Metric | Value |
|---|---|
| Page metrics | |
| Performance score | 77 |
| Total page size | 781.6 KB |
| Requests | 30 |
| Timing metrics | |
| TTFB | 603 ms |
| First Paint | 1.224 s |
| Fully Loaded | 6.701 s |
| Google Web Vitals | |
| TTFB | 603 ms |
| First Contentful Paint (FCP) | 1.224 s |
| Largest Contentful Paint (LCP) | 1.224 s |
| Cumulative Layout Shift (CLS) | 0.00 |
| Total Blocking Time | 98 ms |
| Max Potential FID | 83 ms |
| CPU metrics | |
| CPU long tasks | 8 |
| CPU last long task happens at | 1.829 s |
| Visual Metrics | |
| First Visual Change | 1.233 s |
| Speed Index | 1.573 s |
| Visual Complete 85% | 1.233 s |
| Visual Complete 99% | 9.566 s |
| Last Visual Change | 17.133 s |
Use--filmstrip.showAll to show all filmstrips.
0 s0.9 smwStartup 874 ms1.1 sCPU Long Task duration 158 ms1.2 sCPU Long Task duration 73 ms
1.3 sFirst Contentful Paint 1.224 sLCP <P> 1.224 sFirst Visual Change 1.233 sVisual Complete 85% 1.233 sLargest Image 1.233 sHeading 1.233 sVisual Complete 95% 1.266 sCPU Long Task duration 83 ms
1.4 s
1.5 sCPU Long Task duration 65 msDOM Content Loaded Time 1.477 s
1.6 sCPU Long Task duration 66 ms
1.7 sCPU Long Task duration 59 msLayout Shift 0.00119 1.682 s
1.8 sCPU Long Task duration 54 ms
1.9 sCPU Long Task duration 71 ms
2 sPage Load Time 1.905 s
2.1 s
2.2 s
2.3 s
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2.5 s
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3 s
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6 s
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6.7 s
6.8 sFully Loaded 6.701 s
6.9 s
7 s
7.1 s
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9 s
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9.5 s
9.6 sVisual Complete 99% 9.566 s
9.7 s
9.8 s
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10 s
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11 s
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12 s
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13 s
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14 s
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15 s
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16 s
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16.9 s
17 s
17.1 s
17.2 sLast Visual Change 17.133 sThe 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 8.1.3.
| Title | Advice | Score | ||||||
|---|---|---|---|---|---|---|---|---|
| Don't scale images in the browser (avoidScalingImages) | The page has 3 images 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. | 70 | ||||||
| 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: | ||||||||
| 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. | 95 | ||||||
| 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 8 CPU long tasks with the total of 629 ms. The total blocking time is 98 ms and 2 long tasks before first contentful paint with total time of 231 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. | 0 | ||||||
| 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: | ||||||||
| Avoid extra requests by setting cache headers (cacheHeaders) | The page has 25 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 311.5 kB the next access. | 0 | ||||||
| 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: | ||||||||
| Long cache headers is good (cacheHeadersLong) | The page has 1 request that have a shorter cache time than 30 days (but still a cache time). | 99 | ||||||
| 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: | ||||||||
| Make each CSS response small (optimalCssSize) | https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.styles%7Cext.cite.styles%7Cext.echo.styles.alert%2Cbadge%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cext.wp25EasterEggs.styles%7Cjquery.makeCollapsible.styles%7Cmediawiki.page.gallery.styles%7Coojs-ui.styles.icons-alerts%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022 size is 26.7 kB (26678) and that is bigger than the limit of 14.5 kB. Try to make the CSS files fit into 14.5 KB. | 90 | ||||||
| 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:
| ||||||||
| Title | Advice | Score |
|---|---|---|
| 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: | ||
| Page info | |
|---|---|
| Title | Facebook - Wikipedia |
| Generator | MediaWiki 1.46.0-wmf.21 |
| Width | 1904 |
| Height | 29442 |
| DOM elements | 14029 |
| Avg DOM depth | 14 |
| Max DOM depth | 30 |
| Iframes | 0 |
| Script tags | 5 |
| Local storage | 1.0 MB |
| Session storage | 0 b |
| Network Information API | 4g |
| Resource Hints |
|---|
| dns-prefetch |
| https://meta.wikimedia.org/ |
| preconnect |
| https://upload.wikimedia.org/ |
Data collected using Wappalyzer version 6.10.54. With updated code from Webappanalyzer 2024-12-27. Use --browsertime.firefox.includeResponseBodies htmlor --browsertime.chrome.includeResponseBodies htmlto help Wappalyzer find more information about technologies used.
| Technology | Confidence | Category |
|---|---|---|
| MediaWiki | 100 | Wikis |
| PHP | 100 | Programming languages |
| HSTS | 100 | Security |
| Visual Metrics | |
|---|---|
| First Visual Change | 1.233 s |
| Speed Index | 1.573 s |
| Largest Image | 1.233 s |
| Heading | 1.233 s |
| LargestContentfulPaint | 1.233 s |
| Last Meaningful Paint | 1.233 s |
| Largest Contentful Paint | 1.233 s |
| Visual Complete 85% | 1.233 s |
| Visual Complete 95% | 1.266 s |
| Visual Complete 99% | 9.566 s |
| Last Visual Change | 17.133 s |
| Visual Readiness | 15.900 s |
| Navigation Timing | |
|---|---|
| backEndTime | 603 ms |
| domContentLoadedTime | 1.477 s |
| domInteractiveTime | 1.477 s |
| domainLookupTime | 0 ms |
| frontEndTime | 689 ms |
| pageDownloadTime | 612 ms |
| pageLoadTime | 1.905 s |
| redirectionTime | 0 ms |
| serverConnectionTime | 0 ms |
| serverResponseTime | 1.207 s |
| Google Web Vitals | |
|---|---|
| Time to first byte (TTFB) | 603 ms |
| First Contentful Paint (FCP) | 1.224 s |
| Largest Contentful Paint (LCP) | 1.224 s |
| Cumulative Layout Shift (CLS) | 0.00 |
| Total Blocking Time (TBT) | 98 ms |
| First Contentful Paint info | |
|---|---|
| Elements that needed recalculate style before FCP | 7927 |
| Time spent in recalculate style before FCP | 117.398 ms |
| Extra timings | |
|---|---|
| TTFB | 603 ms |
| First Paint | 1.224 s |
| Load Event End | 1.905 s |
| Fully loaded | 6.701 s |
| User Timing marks | |
|---|---|
| mwStartup | 874 ms |
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 | 1.224 s |
| Element render delay | 621 ms |
| TTFB | 603 ms |
| Resource delay | 0 ms |
| Resource load duration | 0 ms |
| Elements that needed recalculate style before LCP | 7927 |
| Time spent in recalculate style before LCP | 117.398 ms |
| Load time | 0 ms |
| Size (width*height) | 101088 |
| DOM path | |
| div:eq(2) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(1) > p:eq(4)> div:eq(2) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(1) > p:eq(4)> | |
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.
0.00119 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 |
|---|---|
| 0.00119 | <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects"></div>,<div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export"></div>,<nav class="vector-appearance-landmark" aria-label="Appearance"></nav>,<span class="vector-icon mw-ui-icon-wikimedia-expand"></span>,<span class="vector-icon mw-ui-icon-wikimedia-expand"></span> |
| body > div:eq(2) > div > div:eq(2) > main#content > div:eq(1) > div > nav:eq(0) > div#vector-page-tools-pinned-container > div#vector-page-tools > div#p-wikibase-otherprojects,body > div:eq(2) > div > div:eq(2) > main#content > div:eq(1) > div > nav:eq(0) > div#vector-page-tools-pinned-container > div#vector-page-tools > div#p-coll-print_export,body > div:eq(2) > div > div:eq(2) > main#content > div:eq(1) > div > nav:eq(1),body > div:eq(2) > 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-Criticisms_and_controversies > button > span:eq(0),body > div:eq(2) > 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-Impact > 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.
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 |
|---|---|---|---|---|
| 101.4 ms | 395.4 ms | 142.2 ms | 0.1 ms | 142.1 ms |
| https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 | ||||
Invoker: https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 | ||||
| Blocking duration | Work duration | Render duration | PreLayout Duration | Style And Layout Duration |
|---|---|---|---|---|
| 72 ms | 69.4 ms | 55.8 ms | 35.7 ms | 20.1 ms |
| https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=vector-2022&version=s42id | ||||
Invoker: TimerHandler:setTimeout | ||||
| https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 | ||||
Forced Style And Layout Duration: 21 ms Invoker: FrameRequestCallback | ||||
| Blocking duration | Work duration | Render duration | PreLayout Duration | Style And Layout Duration |
|---|---|---|---|---|
| 37 ms | 24.1 ms | 76.2 ms | 0 ms | 76.2 ms |
| https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 | ||||
Invoker: IdleRequestCallback | ||||
| Blocking duration | Work duration | Render duration | PreLayout Duration | Style And Layout Duration |
|---|---|---|---|---|
| 28.8 ms | 21.3 ms | 68.4 ms | 0 ms | 68.4 ms |
| https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=vector-2022&version=s42id | ||||
Invoker: https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=vector-2022&version=s42id | ||||
| Blocking duration | Work duration | Render duration | PreLayout Duration | Style And Layout Duration |
|---|---|---|---|---|
| 23.9 ms | 39.6 ms | 47.6 ms | 0.1 ms | 47.5 ms |
| https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=vector-2022&version=s42id | ||||
Invoker: TimerHandler:setTimeout | ||||
| Blocking duration | Work duration | Render duration | PreLayout Duration | Style And Layout Duration |
|---|---|---|---|---|
| 22.5 ms | 24.1 ms | 60 ms | 0.1 ms | 59.9 ms |
| No availible script information. | ||||
| Blocking duration | Work duration | Render duration | PreLayout Duration | Style And Layout Duration |
|---|---|---|---|---|
| 21.8 ms | 7.3 ms | 68 ms | 0.1 ms | 67.9 ms |
| No availible script information. | ||||
| name | duration | description |
|---|---|---|
| cache | 0 | pass |
| host | 0 | cp3070 |
There are no custom configured scripts.
There are no custom extra metrics from scripting.
| name | value |
|---|---|
| AudioHandlers | 0 |
| AudioWorkletProcessors | 0 |
| Documents | 45 |
| Frames | 41 |
| JSEventListeners | 4371 |
| LayoutObjects | 22617 |
| MediaKeySessions | 0 |
| MediaKeys | 0 |
| Nodes | 79309 |
| Resources | 180 |
| ContextLifecycleStateObservers | 120 |
| V8PerContextDatas | 3 |
| WorkerGlobalScopes | 0 |
| UACSSResources | 3 |
| RTCPeerConnections | 0 |
| ResourceFetchers | 45 |
| AdSubframes | 0 |
| DetachedScriptStates | 0 |
| ArrayBufferContents | 0 |
| LayoutCount | 14 |
| RecalcStyleCount | 19 |
| LayoutDuration | 188 |
| RecalcStyleDuration | 316 |
| DevToolsCommandDuration | 61 |
| ScriptDuration | 226 |
| V8CompileDuration | 1 |
| TaskDuration | 1217 |
| TaskOtherDuration | 425 |
| ThreadTime | 2 |
| ProcessTime | 12 |
| JSHeapUsedSize | 18587336 |
| JSHeapTotalSize | 23875584 |
| FirstMeaningfulPaint | 1220 |
| Name | Display Time | X | Y | Width | Height |
|---|---|---|---|---|---|
| LargestImage (Facebook_user_page.png) | 1.233 s | 1321 | 424 | 300 | 439 |
| <img alt="This is a screenshot of Mark Zuckerburg's Facebook profile. It includes his profile photo and a header photo of llamas." src="//upload.wikimedia.org/wikipedia/en/6/64/Facebook_user_page.png" decoding="async" width="300" height="439" class="mw-file-element" data-file-width="261" data-file-height="382"> | |||||
| Heading | 1.233 s | 324 | 90 | 1104 | 40 |
| <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1> | |||||
| LargestContentfulPaint | 1.233 s | 324 | 460 | 1256 | 110 |
| <p></p> | |||||
How the page is built.
| Summary | |
|---|---|
| HTTP version | HTTP/2.0 |
| Total requests | 30 |
| Total domains | 2 |
| Total transfer size | 781.6 KB |
| Total content size | 1.9 MB |
| Responses missing compression | 3 |
| Number of cookies | 1 |
| Third party cookies | 0 |
| Requests per response code | |
|---|---|
| 200 | 29 |
| 202 | 1 |
| Content | Header Size | Transfer Size | Content Size | Requests |
|---|---|---|---|---|
| html | 0 b | 202.2 KB | 1.1 MB | 1 |
| css | 0 b | 26.1 KB | 206.8 KB | 1 |
| javascript | 0 b | 40.5 KB | 139.0 KB | 1 |
| image | 0 b | 304.2 KB | 280.8 KB | 25 |
| video | 0 b | 207.8 KB | 206.9 KB | 1 |
| plain | 0 b | 867 B | 0 b | 1 |
| Total | 0 b | 781.6 KB | 1.9 MB | 30 |
| Domain | Total download time | Transfer Size | Content Size | Requests |
|---|---|---|---|---|
| en.wikipedia.org | 2.002 s | 477.4 KB | 1.7 MB | 5 |
| upload.wikimedia.org | 6.635 s | 304.2 KB | 280.8 KB | 25 |
| type | min | median | max |
|---|---|---|---|
| Expires | 0 seconds | 0 seconds | 1 year |
| Last modified | 1 minute | 48 weeks | 9 years |
No console log messages.
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 |
| video | 207.8 KB | 1 |
| plain | 867 B | 1 |
| Total | 208.6 KB | 2 |
Includes requests done after DOM content loaded.
| Content | Transfer Size | Requests |
|---|---|---|
| html | 0 b | 0 |
| css | 0 b | 0 |
| javascript | 0 b | 0 |
| image | 111.3 KB | 10 |
| font | 0 b | 0 |
| video | 207.8 KB | 1 |
| plain | 867 B | 1 |
| Total | 319.9 KB | 12 |
Download the Chrome trace log and drag and drop it into Developer Tools / Performance in Chrome.
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 | 98 | |
| Max Potential First Input Delay | 83 | |
| Long Tasks before First Paint | 2 | 231 |
| Long Tasks before First Contentful Paint | 2 | 231 |
| Long Tasks before Largest Contentful Paint | 2 | 231 |
| Long Tasks after Load Event End | 0 | 0 |
| Total Long Tasks | 8 | 629 |
CPU last long task happened at 1.829 s
| name | startTime | duration | containerId | containerName | containerSrc | containerType |
|---|---|---|---|---|---|---|
| unknown | 1008 | 158 | window | |||
| unknown | 1199 | 73 | window | |||
| unknown | 1297 | 83 | window | |||
| unknown | 1404 | 65 | window | |||
| self | 1558 | 66 | window | |||
| self | 1626 | 59 | window | |||
| unknown | 1725 | 54 | window | |||
| unknown | 1829 | 71 | window |
Calculated using Tracium.
| Categories (ms) | |
|---|---|
| parseHTML | 59 |
| styleLayout | 504 |
| paintCompositeRender | 38 |
| scriptParseCompile | 1 |
| scriptEvaluation | 217 |
| garbageCollection | 28 |
| other | 354 |
| Events (ms) | |
|---|---|
| UpdateLayoutTree | 314 |
| RunTask | 195 |
| FunctionCall | 185 |
| Layout | 182 |
| PrePaint | 77 |
| ParseHTML | 56 |
| Paint | 33 |
| CpuProfiler::StartProfiling | 32 |
| DocumentLoader::BodyLoadingFinished | 12 |
| V8.GC_MC_INCREMENTAL_EMBEDDER_TRACING | 10 |
afterPageCompleteCheck.jpg
layoutShift.jpg
largestContentfulPaint.jpg
