rust-lang.org speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 15:03 UTC. Grade A (96/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 82 ms 29%
- TCP connect 52 ms 18%
- Server wait 151 ms 53%
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 286 ms. That is workable, and the cheapest win left is caching or a warmer connection.
- The page transfers 50.9 KB over 22 request(s). Css files are 37% of it, so split the stylesheet so the first screen does not download the whole site.
- The HTML itself arrives gzip-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- The largest element painted at 548 ms, inside the 2.5 s Google calls good.
- Layout stayed still (CLS 0.002), so nothing jumps under the reader's cursor.
- The main thread was blocked for 60 ms in total, which is not enough to feel.
Fix first: Render-blocking resources - Add defer or async to scripts that do not change the first paint, inline the critical CSS, and load the rest with media="print" plus an onload swap.
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. 22 request(s) in total, 50.9 KB across all of them.
Top issues
Render-blocking resources
high impact4 render-blocking resource(s) in the document head (0 script(s), 4 stylesheet(s)). The page cannot paint until each one arrives.
Fix: Add defer or async to scripts that do not change the first paint, inline the critical CSS, and load the rest with media="print" plus an onload swap.
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://rust-lang.org/static/images/networking.svg | images | 200 | 885 ms | 1.1 KB |
| https://rust-lang.org/static/images/embedded.svg | images | 200 | 845 ms | 2.4 KB |
| https://rust-lang.org/static/images/favicon-32x32.png | images | 200 | 837 ms | 2.9 KB |
| https://rust-lang.org/static/styles/fonts_8049871103083011125.css | css | 200 | 806 ms | 1.2 KB |
| https://rust-lang.org/static/scripts/languages.js | javascript | 200 | 785 ms | 502 B |
| https://rust-lang.org/static/scripts/init.js | javascript | 200 | 783 ms | 48 B |
| https://rust-lang.org/static/styles/vendor_10880690442070639967.css | css | 200 | 778 ms | 14.0 KB |
| https://rust-lang.org/static/images/youtube.svg | images | 200 | 775 ms | 317 B |
| https://rust-lang.org/static/images/mastodon.svg | images | 200 | 774 ms | 942 B |
| https://rust-lang.org/static/images/github.svg | images | 200 | 771 ms | 547 B |
| https://rust-lang.org/static/images/rust-logo-blk.svg | images | 200 | 769 ms | 918 B |
| https://rust-lang.org/static/images/bluesky.svg | images | 200 | 769 ms | 553 B |
| https://rust-lang.org/static/styles/a11y-dark.css | css | 200 | 768 ms | 653 B |
| https://rust-lang.org/static/scripts/highlight.pack.js | javascript | 200 | 766 ms | 9.7 KB |
| https://rust-lang.org/static/images/webassembly.svg | images | 200 | 764 ms | 975 B |
| https://rust-lang.org/static/images/cli.svg | images | 200 | 763 ms | 448 B |
| https://rust-lang.org/static/images/apple-touch-icon.png?v=ngJW8jGAmR | images | 200 | 762 ms | 2.4 KB |
| https://rust-lang.org/static/images/favicon.svg | images | 200 | 760 ms | 1.7 KB |
| https://rust-lang.org/static/images/favicon-16x16.png | images | 200 | 747 ms | 2.2 KB |
| https://rust-lang.org/static/images/site.webmanifest?v=ngJW8jGAmR | other | 200 | 747 ms | 202 B |
| https://rust-lang.org/static/styles/app_17774143076088586802.css | css | 200 | 740 ms | 2.7 KB |
Report this page
Run this test on your own site
The same engine, free, with the screenshots and the fixes. No account needed.