3 pages analysed for https://www.example.com

Tested 2026-08-17 06:54:00 using Chrome (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

10 files·1.0 MB transfer·5.0 MB size

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://github.githu...f91072b68048a3.js → page → run2 days1 year470.5 KB2.5 MB
https://github.githu...63dd60f91fc3ba.js → page → run3 days1 year133.2 KB660.2 KB
https://github.githu...46d439e854f735.js → page → run4 weeks1 year105.0 KB458.3 KB
https://github.githu...bc1d5f4c29bd44.js → page → run2 days1 year79.7 KB259.9 KB
https://github.githu...87389963328ab8.js → page → run3 days1 year55.6 KB259.7 KB
https://github.githu...41f0170af776ce.js → page → run2 days1 year57.8 KB220.8 KB
https://github.githu...31b8cbd631667c.js → page → run3 weeks1 year29.6 KB196.1 KB
https://github.githu...1e7314c65e556e.js → page → run2 weeks1 year56.6 KB190.6 KB
https://github.githu...414dc2340e0a21.js → page → run1 week1 year26.7 KB129.3 KB
https://github.githu...a58a024a6e2321.js → page → run4 days1 year29.0 KB122.5 KB

Largest CSS files

10 files·252.5 KB transfer·2.2 MB size

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

urltime since last modifiedcache timetransfersize
https://github.githu...781cc2.module.css → page → run3 weeks1 year69.5 KB678.0 KB
https://github.githu...0e2225731ad3f.css → page → run2 weeks1 year42.3 KB402.3 KB
https://github.githu...303a14f5c5e97.css → page → run3 days1 year39.9 KB290.7 KB
https://github.githu...c8e3e3.module.css → page → run3 days1 year34.1 KB284.8 KB
https://github.githu...c16002818df36.css → page → run2 weeks1 year21.4 KB124.7 KB
https://github.githu...627722.module.css → page → run2 days1 year16.4 KB101.1 KB
https://github.githu...b867e16562d12.css → page → run2 weeks1 year7.2 KB85.9 KB
https://github.githu...11e11e3ed53a8.css → page → run2 weeks1 year7.4 KB85.8 KB
https://github.githu...b19cf061aa459.css → page → run2 weeks1 year7.1 KB85.3 KB
https://github.githu...3c6b445d800ff.css → page → run2 weeks1 year7.1 KB85.1 KB

Largest image files

10 files·539.2 KB transfer·534.8 KB size

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://github.githu...053d8d541a414.jpg → page → run29 weeks1 year189.4 KB189.0 KB
https://github.githu...70cf59da664ea.jpg → page → run29 weeks1 year139.8 KB139.4 KB
https://github.githu...95cf9822e0d5c.jpg → page → run29 weeks1 year43.6 KB43.2 KB
https://github.githu...11ff73d84fd3b.jpg → page → run29 weeks1 year40.7 KB40.4 KB
https://github.githu...df7af6c5dc157.jpg → page → run29 weeks1 year32.2 KB31.8 KB
https://github.githu...97c0b02963d75.jpg → page → run29 weeks1 year29.8 KB29.4 KB
https://github.githu...96cf3572b780d.jpg → page → run29 weeks1 year22.2 KB21.8 KB
https://www.wikipedi...pedia-logo-v2.png → page → run4 weeks1 day16.4 KB15.5 KB
https://github.githu...-b882e354c005.png → page → run2 years1 year14.5 KB14.1 KB
https://github.githu...7e609004c77cc.jpg → page → run29 weeks1 year10.6 KB10.2 KB

Largest font files

2 files·251.5 KB transfer·250.7 KB size

Web fonts often keep text invisible until they arrive. Subset the biggest ones or use font-display to show text earlier.

urltime since last modifiedcache timetransfersize
https://github.githu...ff47c93bd97.woff2 → page → run2 weeks1 year214.6 KB214.2 KB
https://github.githu...51ce1316829.woff2 → page → run2 weeks1 year36.9 KB36.5 KB

Largest HTML files

3 files·151.4 KB transfer·679.1 KB size

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

urltime since last modifiedcache timetransfersize
https://github.com/ → page → run-1 second0 seconds119.7 KB561.0 KB
https://www.wikipedia.org/ → page → run4 weeks1 hour31.2 KB117.5 KB
https://www.example.com/ → page → run4 days0 seconds474 B559 B

Largest favicon files

1 file·1.8 KB transfer·2.7 KB size

The largest favicon files across the tested pages.

urltime since last modifiedcache timetransfersize
https://www.wikipedi...con/wikipedia.ico → page → run6 weeks1 year1.8 KB2.7 KB

Largest other files

6 files·811.6 KB transfer·806.8 KB size

The largest other files across the tested pages.

urltime since last modifiedcache timetransfersize
https://github.githu...4522f687c1719.glb → page → run29 weeks1 year268.1 KB267.7 KB
https://github.githu...defe0e666acf2.glb → page → run29 weeks1 year247.7 KB247.3 KB
https://github.githu...12913788eaa25.glb → page → run29 weeks1 year170.9 KB170.5 KB
https://github.githu...76cd962f04df2.glb → page → run29 weeks1 year120.3 KB119.9 KB
https://github.com/manifest.json → page → run-1 second1 week4.6 KB1.4 KB
https://www.github.com/ → page → run-1 second0 secondsN/A0 b

Largest text files

2 files

The largest text files across the tested pages.

urltime since last modifiedcache timetransfersize
https://collector.gi...om/github/collect → page → run-1 second0 seconds495 B0 b
https://api.github.c...ate/browser/stats → page → run-1 second0 seconds0 b0 b

Largest SVG files

2 files·20.0 KB transfer·50.9 KB size

The largest SVG files across the tested pages.

urltime since last modifiedcache timetransfersize
https://www.wikipedi...rite-e49fbf32.svg → page → run4 weeks1 day18.7 KB50.0 KB
https://github.githu...icons/favicon.svg → page → run2 years0 seconds1.3 KB959 B

Largest video files

1 file·N/A transfer·384.0 KB size

The largest video files across the tested pages.

urltime since last modifiedcache timetransfersize
https://github.githu...4c7cb53b4aebb.mp4 → page → run29 weeks1 yearN/A384.0 KB

Slowest responses

10 files·199.8 KB transfer·772.0 KB size

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://github.com/ → page → runhtml-1 second0 seconds119.7 KB561.0 KB128 ms
https://github.githu...a00a8b4809c098.js → page → runjavascript2 weeks1 year557 B596 B103 ms
https://www.github.com/ → page → runother-1 second0 secondsN/A0 b51 ms
https://www.wikipedi...con/wikipedia.ico → page → runfavicon6 weeks1 year1.8 KB2.7 KB23 ms
https://www.example.com/ → page → runhtml4 days0 seconds474 B559 B20 ms
https://www.wikipedia.org/ → page → runhtml4 weeks1 hour31.2 KB117.5 KB14 ms
https://www.wikipedi...pedia-logo-v2.png → page → runimage4 weeks1 day16.4 KB15.5 KB10 ms
https://www.wikipedi...ie9-507b16b6be.js → page → runjavascript4 weeks1 day1.5 KB580 B8 ms
https://www.wikipedi...dex-34f340e24a.js → page → runjavascript4 weeks1 day9.4 KB23.6 KB7 ms
https://www.wikipedi...rite-e49fbf32.svg → page → runsvg4 weeks1 day18.7 KB50.0 KB5 ms

Short or no cache time

8 files·47.8 KB transfer·90.5 KB size

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://www.wikipedi...rite-e49fbf32.svg → page → runsvg4 weeks1 day18.7 KB50.0 KB
https://www.wikipedi...pedia-logo-v2.png → page → runimage4 weeks1 day16.4 KB15.5 KB
https://www.wikipedi...dex-34f340e24a.js → page → runjavascript4 weeks1 day9.4 KB23.6 KB
https://www.wikipedi...ie9-507b16b6be.js → page → runjavascript4 weeks1 day1.5 KB580 B
https://github.githu...icons/favicon.svg → page → runsvg2 years0 seconds1.3 KB959 B
https://collector.gi...om/github/collect → page → runplain-1 second0 seconds495 B0 b
https://api.github.c...ate/browser/stats → page → runplain-1 second0 seconds0 b0 b
https://www.github.com/ → page → runother-1 second0 secondsN/A0 b