syncthing.net speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 13:58 UTC. Grade A (92/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 70 ms 27%
- TCP connect 47 ms 18%
- Server wait 140 ms 54%
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 257 ms. That is workable, and the cheapest win left is caching or a warmer connection.
- The page transfers 360.6 KB over 19 request(s). Images files are 72% of it, so resize and recompress the largest images before anything else.
- The HTML itself arrives gzip-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- 37% of the weight comes from other hosts (analytics, fonts, embeds), which also means their slow day becomes your slow day.
- The largest element painted at 968 ms, inside the 2.5 s Google calls good.
- Layout stayed still (CLS 0.001), so nothing jumps under the reader's cursor.
- The main thread was blocked for 1 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. 19 request(s) in total, 360.6 KB across all of them.
Top issues
Render-blocking resources
high impact6 render-blocking resource(s) in the document head (1 script(s), 5 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.
Image delivery and format
medium impact0 image(s) over 200 KB and 1 large image(s) still served as JPEG or PNG.
Fix: Serve WebP or AVIF with a JPEG fallback, size images to the space they occupy, and lazy-load anything below the fold. Images are usually more than half of a slow page.
Mobile viewport
medium impactNo viewport meta tag, so a phone renders the desktop layout scaled down.
Fix: Add a viewport meta tag with width=device-width and an initial scale of 1.
Third-party weight
low impact5 third-party host(s) serve 134.6 KB of this page. Each one is another DNS lookup, TLS handshake and point of failure you do not control.
Fix: Self-host the libraries you can, drop the tags you cannot justify, and preconnect the ones you keep.
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://cdn.kastelo.net/prm/i6erbm-shield-green-dark-padded-512.png 3rd party | images | 200 | 1.01 s | 23.7 KB |
| https://syncthing.net/js/theme/theme.switcher.js | javascript | 200 | 982 ms | 513 B |
| https://syncthing.net/css/font-awesome.css | css | 200 | 910 ms | 12.1 KB |
| https://syncthing.net/stars_hu_72165b77baf455d6.jpg | images | 200 | 808 ms | 191.1 KB |
| https://syncthing.net/img/reefsol.png | images | 200 | 772 ms | 7.4 KB |
| https://syncthing.net/img/favicons/favicon-32x32.png | images | 200 | 759 ms | 1.9 KB |
| https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js 3rd party | javascript | 200 | 750 ms | 15.6 KB |
| https://code.jquery.com/jquery-3.4.1.min.js 3rd party | javascript | 200 | 749 ms | 29.9 KB |
| https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js 3rd party | javascript | 200 | 734 ms | 6.5 KB |
| https://syncthing.net/img/kastelo-dark.svg | images | 200 | 728 ms | 1.8 KB |
| https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.13.0/css/all.min.css 3rd party | css | 200 | 727 ms | 10.1 KB |
| https://syncthing.net/img/logo-horizontal.svg | images | 200 | 720 ms | 1.5 KB |
| https://syncthing.net/css/auto.css | css | 200 | 716 ms | 53 B |
| https://syncthing.net/css/overrides.css | css | 200 | 711 ms | 823 B |
| https://avatars.githubusercontent.com/u/74066406?v=4 3rd party | images | 200 | 706 ms | 25.0 KB |
| https://syncthing.net/img/favicons/favicon-16x16.png | images | 200 | 701 ms | 774 B |
| https://syncthing.net/img/favicon.png | images | 200 | 700 ms | 4.8 KB |
| https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css 3rd party | css | 200 | 689 ms | 23.9 KB |
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