www.cbs.com speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 14:39 UTC. Grade B (80/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 80 ms 30%
- TCP connect 47 ms 18%
- Server wait 139 ms 52%
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 266 ms. That is workable, and the cheapest win left is caching or a warmer connection.
- The page transfers 1.68 MB over 24 request(s). Javascript files are 42% 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.
- 55% 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 560 ms, inside the 2.5 s Google calls good.
- Layout stayed still (CLS 0.063), so nothing jumps under the reader's cursor.
- The main thread was blocked for 315 ms, so taps and scrolling wait while scripts run.
Fix first: Image delivery and format - 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.
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. 24 request(s) in total, 1.68 MB across all of them.
Top issues
Image delivery and format
high impact1 image(s) over 200 KB and 2 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.
Render-blocking resources
high impact5 render-blocking resource(s) in the document head (1 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.
Total page weight
high impactThe page transfers 1.68 MB across 24 request(s), with the document itself at 41.5 KB.
Fix: Work through the heaviest assets first: images, then fonts, then third-party scripts.
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.
Third-party weight
medium impact3 third-party host(s) serve 940.0 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.
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://wwwimage-tve.cbsstatic.com/thumbnails/photos/w1024-q80/marquee/1049152/61/73/46/asset_marquee_27f7d39d-6804-4de8-a225-ae14104a5d90.jpg 3rd party | images | 200 | 961 ms | 87.3 KB |
| https://wwwimage-tve.cbsstatic.com/thumbnails/photos/w1920-q80/marquee/1049152/61/73/46/asset_marquee_27f7d39d-6804-4de8-a225-ae14104a5d90.jpg 3rd party | images | 200 | 951 ms | 299.2 KB |
| https://splice.amlg.io/api/v2/video/ALVE01M4628G2QEWRSB152B0MYP49Z/preview/high69.mp4 3rd party | other | 404 | 931 ms | 53 B |
| https://www.cbs.com/assets/web-components/static/js/main.1fa73a8f.js | javascript | 200 | 922 ms | 401.6 KB |
| https://wwwimage-tve.cbsstatic.com/thumbnails/photos/w800-q80/marquee/1049152/61/73/47/asset_marquee_4863efdb-3aea-47f9-bf72-bd2415e665ce.jpg 3rd party | images | 200 | 913 ms | 120.2 KB |
| https://splice.amlg.io/api/v2/video/ALVE01M2989CD7E9TBPZYTSTFXZWK8/preview/high69.mp4 3rd party | html | 307 | 913 ms | 0 B |
| https://wwwimage-tve.cbsstatic.com/thumbnails/photos/w419-q80/marquee/1049152/61/73/50/asset_marquee_a5e07638-80fc-4a51-a647-6fc736b574e8.png 3rd party | images | 200 | 912 ms | 5.8 KB |
| https://www.cbs.com/assets/build/js/core-220f0b6d821656ebbc0b.min.js | javascript | 200 | 909 ms | 146.1 KB |
| https://wwwimage-tve.cbsstatic.com/assets/build/css/fonts/fontsBlack-e85fed8e968b6d8c56e1.min.css 3rd party | css | 200 | 908 ms | 73.6 KB |
| https://cdn.privacy.paramount.com/dist/optanon-v2.0.0.js 3rd party | javascript | 200 | 907 ms | 8.8 KB |
| https://wwwimage-tve.cbsstatic.com/thumbnails/photos/w419-q80/marquee/1049145/01/04/15/asset_marquee_55332676-484b-4d56-b352-95aef9f8c64c.png 3rd party | images | 200 | 902 ms | 7.4 KB |
| https://www.cbs.com/assets/build/js/homepage-16eb867f8bed65786dc6.min.js | javascript | 200 | 901 ms | 161.6 KB |
| https://wwwimage-tve.cbsstatic.com/thumbnails/photos/w419-q80/marquee/1049159/21/74/05/asset_marquee_285bbe60-2e04-4019-ab6d-c7c2bd7ff17f.png 3rd party | images | 200 | 901 ms | 10.5 KB |
| https://wwwimage-tve.cbsstatic.com/thumbnails/photos/w419-q80/marquee/1049166/82/17/57/asset_marquee_7771630f-8b58-46c5-b8ca-daa09401a6d9.png 3rd party | images | 200 | 896 ms | 9.0 KB |
| https://wwwimage-tve.cbsstatic.com/assets/build/css/fonts/fonts-83c17fd1784e1000d598.min.css 3rd party | css | 200 | 895 ms | 121.9 KB |
| https://splice.amlg.io/api/v2/video/ALVE01M2GPJ81HEQAAA00R3BEKSGC0/preview/high69.mp4 3rd party | html | 307 | 887 ms | 0 B |
| https://wwwimage-tve.cbsstatic.com/thumbnails/photos/w419-q80/marquee/1049159/21/77/44/asset_marquee_84996975-7f0b-4b7e-81eb-6f37fb2334ac.png 3rd party | images | 200 | 879 ms | 14.2 KB |
| https://wwwimage-tve.cbsstatic.com/thumbnails/photos/w419-q80/marquee/1049152/61/74/45/asset_marquee_82446850-04d3-4438-a696-dbf3ad71271c.png 3rd party | images | 200 | 877 ms | 8.7 KB |
| https://wwwimage-tve.cbsstatic.com/assets/build/css/pages/homepage-8000dd534216ac430a7d.min.css 3rd party | css | 200 | 869 ms | 173.5 KB |
| https://www.cbs.com/assets/web-components/static/css/main.641826ff.css | css | 200 | 869 ms | 27.7 KB |
| https://www.cbs.com/favicon.ico | images | 200 | 869 ms | 965 B |
| https://splice.amlg.io/api/v2/video/ALVE01M3QWCT63E8FAJFMWD16QMV0G/preview/high69.mp4 3rd party | html | 307 | 869 ms | 0 B |
| https://splice.amlg.io/api/v2/video/ALVE01M2GFK5PJESJS105J2SD9EQFH/preview/high69.mp4 3rd party | html | 307 | 869 ms | 0 B |
Report this page
Run this test on your own site
The same engine, free, with the screenshots and the fixes. No account needed.