Performance Report For
https://stackoverflow.com/
Report date: 2021-07-19 13:38:21
Your Score
This is a fast website, but don't sleep, there are still some pending tweaks for this page.
Load Time
4.61 s
This page has slightly better score than the average, yet it's still outside the recommended values. The goal is to be under 2 seconds.
Total Size
508 KB
The page has a very good weight size, it's better than the average and between the recommended parameters. The goal is to be under 500 KB in total. This is a good result.
HTTP Requests
42 requests
While this page needs less requests than the average, it's outside the recommended parameters. The goal is to be under 25 requests, this affects the overall score.
Recommendations to optimise this page
These recommendations are presented sorted by performance impact, pick the issues with higher impact, with a lower estimated amount of work to fix them. Repeat until you're happy with the results.
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. Learn more.
| URL | Size | Saving |
|---|---|---|
| https://cdn.sstatic.net/Shared/stacks.css?v=b4e52b... | 41 KB | 1.08 s |
| https://cdn.sstatic.net/Sites/stackoverflow/primar... | 59 KB | 450 ms |
| https://ajax.googleapis.com/ajax/libs/jquery/1.12.... | 34 KB | 1.08 s |
| https://cdn.sstatic.net/Js/stub.en.js?v=8eabfaaa0d... | 18 KB | 150 ms |
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn more.
| URL | Size | Saving |
|---|---|---|
| https://cdn.sstatic.net/Sites/stackoverflow/primar... | 59 KB | 55.54 KB |
| https://cdn.sstatic.net/Shared/stacks.css?v=b4e52b... | 41 KB | 37.51 KB |
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn more.
| URL | Size | Saving |
|---|---|---|
| https://cdn.sstatic.net/Js/full-anon.en.js?v=d76b4... | 78 KB | 59.38 KB |
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive. Learn more.
| URL | Size | Saving |
|---|---|---|
| https://cdn.sstatic.net/Sites/networkengineering/I... | 10 KB | 9.77 KB |
| https://cdn.sstatic.net/Img/product/teams/logos/ex... | 9 KB | 9.37 KB |
| https://cdn.sstatic.net/Sites/salesforce/Img/apple... | 8 KB | 7.61 KB |
| https://cdn.sstatic.net/Sites/askubuntu/Img/apple-... | 6 KB | 6 KB |
| https://cdn.sstatic.net/Sites/apple/Img/apple-touc... | 5 KB | 5.08 KB |
| https://cdn.sstatic.net/Sites/quantumcomputing/Img... | 4 KB | 4.04 KB |
| https://cdn.sstatic.net/Img/product/teams/logos/mi... | 4 KB | 3.82 KB |
| https://cdn.sstatic.net/Sites/ai/Img/apple-touch-i... | 3 KB | 2.99 KB |
| https://cdn.sstatic.net/Img/teams/teams-illo-free-... | 3 KB | 2.7 KB |
| https://cdn.sstatic.net/Sites/softwareengineering/... | 2 KB | 2.21 KB |
| https://cdn.sstatic.net/Img/product/teams/logos/in... | 2 KB | 2.16 KB |
| https://cdn.sstatic.net/Sites/dba/Img/apple-touch-... | 2 KB | 2.08 KB |
| https://cdn.sstatic.net/Img/product/teams/logos/bl... | 2 KB | 2.07 KB |
Keep the server response time for the main document short because all other requests depend on it. Learn more.
| URL | Size | Saving |
|---|---|---|
| https://stackoverflow.com/ | 0 KB | 0 KB |