1 page analysed for https://en.wikipedia.beta.wmcl...

Tested 2026-09-20 11:50:44 using Firefox (runtime settings)

The top lists point out the specific files to fix first: the largest and slowest assets across all tested pages, and the assets returning visitors have to download again.

Largest JavaScript files

9 files

Every JavaScript byte is downloaded, parsed and executed on the main thread, so trimming the biggest bundles pays off twice.

urltime since last modifiedcache timetransfersize
https://en.wikipedia...ud.org/w/load.php → run-1 second5 minutes21.7 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks18.3 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks288.1 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks26.2 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks2.9 KB0 b
https://meta.wikimed...d.org/w/index.php → run-1 second0 seconds1.6 KB0 b
https://auth.wikimed...gin/checkLoggedIn → run-1 second0 seconds1.5 KB0 b
https://meta.wikimed...d.org/w/index.php → run-1 second0 seconds1.6 KB0 b
https://meta.wikimed...d.org/w/index.php → run-1 second0 seconds1.6 KB0 b

Largest CSS files

2 files

CSS blocks rendering until it is downloaded and parsed, so the biggest files delay first paint the most.

urltime since last modifiedcache timetransfersize
https://en.wikipedia...ud.org/w/load.php → run-1 second5 minutes27.2 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second5 minutes3.7 KB0 b

Largest image files

10 files

Images are usually the easiest bytes to win back: resize them, compress harder or switch to a modern format like AVIF or WebP.

urltime since last modifiedcache timetransfersize
https://thumb.wikime...lyAddress.ogv.jpg → run5 weeks0 seconds12.9 KB0 b
https://thumb.wikime...bin_Laden.ogv.jpg → run1 week0 seconds7.9 KB0 b
https://upload.wikim...Icon_pdf_file.png → run5 years0 seconds2.2 KB0 b
https://thumb.wikime...-featured.svg.png → run15 weeks0 seconds3.0 KB0 b
https://thumb.wikime...ck-silver.svg.png → run13 weeks0 seconds2.6 KB0 b
https://thumb.wikime...ound-icon.svg.png → run5 weeks0 seconds2.8 KB0 b
https://thumb.wikime..._Barack_Obama.jpg → run4 weeks0 seconds23.4 KB0 b
https://thumb.wikime...udspeaker.svg.png → run5 weeks0 seconds2.4 KB0 b
https://en.wikipedia...uch/wikipedia.png → run2 years1 year2.2 KB0 b
https://en.wikipedia...ipedia-purple.png → run2 years1 year2.1 KB0 b

Largest HTML files

1 file

The HTML document is the first byte of everything: nothing starts rendering before it arrives.

urltime since last modifiedcache timetransfersize
https://en.wikipedia...wiki/Barack_Obama → run2 weeks0 seconds364.2 KB0 b

Largest other files

1 file

The largest other files across the tested pages.

urltime since last modifiedcache timetransfersize
https://en.wikipedia...alAutoLogin/start → run-1 second0 seconds1.1 KB0 b

Largest SVG files

10 files

The largest SVG files across the tested pages.

urltime since last modifiedcache timetransfersize
https://en.wikipedia...loud-services.svg → run2 years1 year2.4 KB0 b
https://en.wikipedia...beta-wordmark.svg → run37 weeks1 year2.3 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks1.2 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks1.5 KB0 b
https://en.wikipedia...n-progressive.svg → run2 years1 year1.1 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks1.2 KB0 b
https://en.wikipedia...r-progressive.svg → run2 years1 year1.2 KB0 b
https://en.wikipedia...nify-clip-ltr.svg → run2 years1 year1.2 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks1.3 KB0 b
https://en.wikipedia...ud.org/w/load.php → run-1 second4 weeks1.3 KB0 b

Slowest responses

10 files

These assets took the longest time to download. Everything that waits for them (rendering, other requests on the same connection) is held up too.

urltypetime since last modifiedcache timetransfersizetiming
https://en.wikipedia...wiki/Barack_Obama → runhtml2 weeks0 seconds364.2 KB0 b1.909 s
https://en.wikipedia...ud.org/w/load.php → runcss-1 second5 minutes27.2 KB0 b608 ms
https://en.wikipedia...ud.org/w/load.php → runjavascript-1 second5 minutes21.7 KB0 b577 ms
https://thumb.wikime...lyAddress.ogv.jpg → runimage5 weeks0 seconds12.9 KB0 b572 ms
https://en.wikipedia...loud-services.svg → runsvg2 years1 year2.4 KB0 b525 ms
https://en.wikipedia...ud.org/w/load.php → runcss-1 second5 minutes3.7 KB0 b522 ms
https://en.wikipedia...beta-wordmark.svg → runsvg37 weeks1 year2.3 KB0 b522 ms
https://thumb.wikime...bin_Laden.ogv.jpg → runimage1 week0 seconds7.9 KB0 b432 ms
https://en.wikipedia...ud.org/w/load.php → runsvg-1 second4 weeks1.5 KB0 b202 ms
https://en.wikipedia...ud.org/w/load.php → runsvg-1 second4 weeks1.2 KB0 b199 ms

Short or no cache time

10 files

Assets with a short cache time are re-downloaded by returning visitors. A longer cache lifetime makes repeat visits faster for free.

urltypetime since last modifiedcache timetransfersize
https://en.wikipedia...ud.org/w/load.php → runcss-1 second5 minutes27.2 KB0 b
https://thumb.wikime..._Barack_Obama.jpg → runimage4 weeks0 seconds23.4 KB0 b
https://en.wikipedia...ud.org/w/load.php → runjavascript-1 second5 minutes21.7 KB0 b
https://thumb.wikime...lyAddress.ogv.jpg → runimage5 weeks0 seconds12.9 KB0 b
https://thumb.wikime...bin_Laden.ogv.jpg → runimage1 week0 seconds7.9 KB0 b
https://en.wikipedia...ud.org/w/load.php → runcss-1 second5 minutes3.7 KB0 b
https://thumb.wikime...-featured.svg.png → runimage15 weeks0 seconds3.0 KB0 b
https://thumb.wikime...ound-icon.svg.png → runimage5 weeks0 seconds2.8 KB0 b
https://thumb.wikime...ck-silver.svg.png → runimage13 weeks0 seconds2.6 KB0 b
https://thumb.wikime...udspeaker.svg.png → runimage5 weeks0 seconds2.4 KB0 b