www.khanacademy.org speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 13:09 UTC. Grade A (96/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 96 ms 30%
- TCP connect 62 ms 19%
- Server wait 164 ms 51%
Measured on the connection that fetched the HTML. Every other request on the page waits for the end of this bar before it can start.
How this page compares
Every report published here is in this comparison, so it is a reference population of pages tested from one server - not a benchmark of the whole web.
What these numbers mean
- The first byte arrived in 321 ms. That is workable, and the cheapest win left is caching or a warmer connection.
- The page transfers 81.5 KB over 4 request(s), which is lean. Fonts files are 94% of it, so subset the fonts and stop preloading the weights you do not render.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- The largest element painted at 1.06 s, inside the 2.5 s Google calls good.
- Layout shift is 0.261 (good is under 0.1): something without a reserved size is loading late - an image, an ad, or a font swap.
- The main thread was blocked for 193 ms in total, which is not enough to feel.
Fix first: Avoid extra redirects - Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.
Read on one shared server, not a visitor's phone: use it to compare pages against each other, not as a promise about every connection. We fix what these tests find.
Screenshot
What the page looks like
Loaded in headless Chromium on this server. Click an image to open it full size.
Browser render
The same URL loaded in a real browser, so these are the readings curl cannot produce. The grade above is still built from the server measurements.
Page weight by type
What the page is made of
Transfer size, compressed as sent. 4 request(s) in total, 81.5 KB across all of them.
Top issues
Avoid extra redirects
medium impact1 redirect hop(s) before the page load started, each one a full round trip before the first byte.
Fix: Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.
Strict-Transport-Security
low impactHSTS is not set, so the first visit on a hostile network can still be downgraded to HTTP.
Fix: Send Strict-Transport-Security with a max-age of at least six months. Add includeSubDomains once every subdomain is HTTPS.
Waterfall
Slowest requests
Each bar is one request's own response time, scaled to the slowest. Assets were fetched in parallel, so the bars overlap in real time rather than stacking. first party third party
| Request | Type | Status | Time | Size |
|---|---|---|---|---|
| https://www.khanacademy.org/_fs-ch-1T1wmsGaOgGaSxcX/assets/styles.css | css | 200 | 340 ms | 1.4 KB |
| https://www.khanacademy.org/_fs-ch-1T1wmsGaOgGaSxcX/assets/inter-var.woff2 | fonts | 200 | 317 ms | 76.6 KB |
| https://www.khanacademy.org/_fs-ch-1T1wmsGaOgGaSxcX/assets/errorIcon.svg | images | 200 | 278 ms | 535 B |
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