sbb.rs speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 15:26 UTC. Grade E (56/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 250 ms 21%
- TCP connect 54 ms 5%
- Server wait 868 ms 74%
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 1.17 s. Everything else waits for that number, so the server is where to start: caching, a slow query, or an overloaded host.
- The page transfers 2.99 MB over 25 request(s). Javascript files are 84% of it, so defer what is not needed for the first screen, and drop tags nobody uses.
- The HTML itself arrives gzip-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- 66% 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 2.46 s, 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 1.15 s, so taps and scrolling wait while scripts run.
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. 25 request(s) in total, 2.99 MB across all of them.
Top issues
Server response time (TTFB)
high impactThe first byte arrived after 1172 ms. Of that, 868 ms was the server thinking and 304 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 impact5 render-blocking resource(s) in the document head (2 script(s), 3 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.
Total page weight
high impactThe page transfers 2.99 MB across 25 request(s), with the document itself at 13.1 KB.
Fix: Work through the heaviest assets first: images, then fonts, then third-party scripts.
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.
Cache static assets
medium impact1 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.
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://sbb.rs/wp-content/themes/sbb-rs/public/css/style.css?id=5a2b7bb8cc9f972b3e55&ver=1792509974 | css | 200 | 1.45 s | 33.2 KB |
| https://api.fraud0.com/api/v2/fz.js?cid=c5f4f7ca-62b5-4741-907f-4adbb72445da 3rd party | javascript | 405 | 1.45 s | 0 B |
| https://cdn.geomant.cloud/buzzeasy/webchatwidget.min.js 3rd party | javascript | 200 | 1.42 s | 1.71 MB |
| https://sbb.rs/wp-content/themes/sbb-rs/old-site-assets/wm-eon/dist/css/style.css?v=1792509974 | css | 200 | 1.37 s | 287.5 KB |
| https://sbb.rs/wp-content/themes/sbb-rs/public/js/app.js?id=a893ff3a2c34e3d3b03b&ver=1792509974 | javascript | 200 | 1.35 s | 226.6 KB |
| https://bzn0hx4sp3.kameleoon.eu/kameleoon.js 3rd party | javascript | 200 | 1.15 s | 30.0 KB |
| https://www.googletagmanager.com/gtag/js?id=AW-879568161 3rd party | javascript | 200 | 952 ms | 162.2 KB |
| https://sbb.rs/wp-content/themes/sbb-rs/public/img/loader-img.png | images | 200 | 943 ms | 6.0 KB |
| https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js?ver=1.9.1 3rd party | javascript | 200 | 941 ms | 32.2 KB |
| https://sbb.rs/wp-content/themes/sbb-rs/old-site-assets/static/picture/favicon120.png | images | 200 | 941 ms | 2.5 KB |
| https://sbb.rs/wp-content/themes/sbb-rs/public/img/yettel-wordmark-lime.png | images | 200 | 939 ms | 117.6 KB |
| https://consent.cookiebot.com/uc.js 3rd party | javascript | 200 | 933 ms | 27.8 KB |
| https://sbb.rs/wp-content/themes/sbb-rs/old-site-assets/static/picture/favicon152.png | images | 200 | 923 ms | 2.9 KB |
| https://sbb.rs/wp-content/themes/sbb-rs/old-site-assets/wm-eon/dist/js/manifest.js | javascript | 200 | 923 ms | 717 B |
| https://code.jquery.com/jquery-3.4.1.min.js 3rd party | javascript | 200 | 910 ms | 29.9 KB |
| https://sbb.rs/wp-content/themes/sbb-rs/old-site-assets/static/picture/favicon76.png | images | 200 | 901 ms | 1.7 KB |
| https://www.google.com/recaptcha/api.js?onload=vueRecaptchaApiLoaded&render=explicit 3rd party | javascript | 200 | 889 ms | 632 B |
| https://sbb.rs/wp-content/themes/sbb-rs/old-site-assets/static/picture/favicon.ico | images | 200 | 888 ms | 512 B |
| https://sbb.rs/wp-includes/css/dist/block-library/style.min.css?ver=5.4.2 | css | 200 | 887 ms | 7.5 KB |
| https://sbb.rs/wp-includes/js/wp-embed.min.js?ver=5.4.2 | javascript | 200 | 887 ms | 769 B |
| https://sbb.rs/wp-content/themes/sbb-rs/public/img/sbb-yettel-logo.png | images | 200 | 882 ms | 11.1 KB |
| https://www.googletagmanager.com/ns.html?id=GTM-MBKVQZ5 3rd party | html | 200 | 882 ms | 92 B |
| https://sbb.rs/wp-content/themes/sbb-rs/old-site-assets/wm-eon/dist/js/sbb.js | javascript | 200 | 878 ms | 270.7 KB |
| https://sbb.rs/wp-content/themes/sbb-rs/old-site-assets/wm-eon/dist/js/vendor.js | javascript | 200 | 868 ms | 44.6 KB |
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