www.rfc-editor.org speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 12:29 UTC. Grade B (81/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 54 ms 6%
- TCP connect 11 ms 1%
- Server wait 788 ms 92%
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 took 853 ms. Everything else waits for that number, so the server is where to start: caching, a slow query, or an overloaded host.
- The page transfers 139.9 KB over 12 request(s), which is lean. Css files are 42% of it, so split the stylesheet so the first screen does not download the whole site.
- The HTML itself arrives br-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- The largest element painted at 1.11 s, inside the 2.5 s Google calls good.
- Layout stayed still (CLS 0.046), so nothing jumps under the reader's cursor.
- The main thread was blocked for 50 ms in total, which is not enough to feel.
Fix first: Server response time (TTFB) - Cut server think time: page cache, query indexes, fewer synchronous calls to third parties inside the request. Connection setup is distance, so a nearer region or a CDN edge helps instead.
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. 12 request(s) in total, 139.9 KB across all of them.
Top issues
Server response time (TTFB)
high impactThe first byte arrived after 853 ms. Of that, 788 ms was the server thinking and 65 ms was connection setup. A first byte under 400 ms is what a visitor feels as instant.
Fix: Cut server think time: page cache, query indexes, fewer synchronous calls to third parties inside the request. Connection setup is distance, so a nearer region or a CDN edge helps instead.
Render-blocking resources
high impact3 render-blocking resource(s) in the document head (1 script(s), 2 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.
Cache static assets
medium impact7 asset(s) answer without a Cache-Control max-age, so browsers revalidate them on every visit.
Fix: Version filenames on change and serve them with a long max-age plus immutable. That is what makes a returning visitor fast.
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.rfc-editor.org/api/v1/favicon/180x180.png | images | 200 | 629 ms | 6.8 KB |
| https://www.rfc-editor.org/_nuxt/1.141.1/logo-mobile.CoO2D8c2.svg | images | 200 | 577 ms | 2.8 KB |
| https://static.ietf.org/fonts/inter/import.css 3rd party | css | 200 | 577 ms | 625 B |
| https://www.rfc-editor.org/_nuxt/1.141.1/CZBM8QAZ.js | javascript | 200 | 577 ms | 135 B |
| https://www.rfc-editor.org/api/v1/favicon/32x32.png | images | 200 | 567 ms | 1017 B |
| https://www.rfc-editor.org/api/v1/favicon/16x16.png | images | 200 | 553 ms | 524 B |
| https://www.rfc-editor.org/api/v1/favicon/48x48.png | images | 200 | 545 ms | 1.7 KB |
| https://www.rfc-editor.org/api/v1/favicon/512x512.png | images | 200 | 543 ms | 21.7 KB |
| https://www.rfc-editor.org/api/v1/favicon/192x192.png | images | 200 | 541 ms | 7.0 KB |
| https://www.rfc-editor.org/_nuxt/1.141.1/style.BU5uCkVr.css | css | 200 | 525 ms | 57.8 KB |
| https://www.rfc-editor.org/_nuxt/1.141.1/logo-desktop.DmfyR5wx.svg | images | 200 | 495 ms | 6.2 KB |
Report this page
Run this test on your own site
The same engine, free, with the screenshots and the fixes. No account needed.