testbook.com speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 12:47 UTC. Grade A (98/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 75 ms 45%
- TCP connect 1 ms 1%
- Server wait 89 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 server answered in 166 ms, which is fast: almost all of the wait is the page itself, not the host.
- The page transfers 345.4 KB over 26 request(s). Images files are 63% of it, so resize and recompress the largest images before anything else.
- The HTML itself arrives br-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- 44% 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 452 ms, inside the 2.5 s Google calls good.
- Layout stayed still (CLS 0.087), so nothing jumps under the reader's cursor.
- The main thread was blocked for 717 ms, so taps and scrolling wait while scripts run.
Fix first: HTML document size - Paginate long listings, move repeated markup into a template, and stop inlining large data URIs into the HTML.
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. 26 request(s) in total, 345.4 KB across all of them.
Top issues
HTML document size
medium impactThe document transfers 127.6 KB. A bloated document delays every other request, because nothing else can start until it is parsed.
Fix: Paginate long listings, move repeated markup into a template, and stop inlining large data URIs into the HTML.
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.testbook.com/resources/productionimages/SSC_All_1594144375.png 3rd party | images | 200 | 1.22 s | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/SSC_All_1594144442.png 3rd party | images | 200 | 1.12 s | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/state%20govt%20exams_All_1583571012.png 3rd party | images | 200 | 994 ms | 2.3 KB |
| https://cdn.testbook.com/resources/productionimages/SSC_All_1594149535.png 3rd party | images | 200 | 983 ms | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/banking_All_1583571298.png 3rd party | images | 200 | 982 ms | 2.0 KB |
| https://cdn.testbook.com/resources/productionimages/SSC%20JE_All_1614071507.png 3rd party | images | 200 | 980 ms | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/railways_All_1583571029.png 3rd party | images | 200 | 975 ms | 3.4 KB |
| https://cdn.testbook.com/resources/productionimages/SSC_All_1594144397.png 3rd party | images | 200 | 971 ms | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/engineering%20recruitment_All_1583571265.png 3rd party | images | 200 | 967 ms | 3.1 KB |
| https://cdn.testbook.com/resources/productionimages/SSC_All_1594144432.png 3rd party | images | 200 | 962 ms | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/ssc_All_1583571021.png 3rd party | images | 200 | 962 ms | 2.4 KB |
| https://cdn.testbook.com/resources/productionimages/defence_All_1583571289.png 3rd party | images | 200 | 957 ms | 2.9 KB |
| https://cdn.testbook.com/resources/productionimages/SSC_All_1594144346.png 3rd party | images | 200 | 950 ms | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/Nursing_All_1631868652.png 3rd party | images | 200 | 950 ms | 896 B |
| https://cdn.testbook.com/resources/productionimages/Delhi%20Police_All_1594144704.png 3rd party | images | 200 | 948 ms | 8.9 KB |
| https://cdn.testbook.com/resources/productionimages/SSC_All_1594144420.png 3rd party | images | 200 | 944 ms | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/teaching_All_1583570997.png 3rd party | images | 200 | 944 ms | 5.1 KB |
| https://cdn.testbook.com/resources/productionimages/SSC_All_1594144453.png 3rd party | images | 200 | 938 ms | 10.8 KB |
| https://cdn.testbook.com/resources/productionimages/UPSC_All_1603294825.png 3rd party | images | 200 | 927 ms | 6.0 KB |
| https://cdn.testbook.com/resources/productionimages/Investigation%20Bureau_All_1594144864.png 3rd party | images | 200 | 926 ms | 6.0 KB |
| https://cdn.testbook.com/resources/productionimages/police_All_1583571236.png 3rd party | images | 200 | 924 ms | 5.1 KB |
| https://testbook.com/angular/assets/img/template-img/playstore.svg | images | 200 | 918 ms | 1.9 KB |
| https://testbook.com/assets/img/index/home-banner__illust.svg | images | 200 | 917 ms | 61.4 KB |
| https://cdn.testbook.com/resources/productionimages/insurance_All_1583571256.png 3rd party | images | 200 | 917 ms | 5.5 KB |
| https://testbook.com/angular/assets/img/template-img/appstore.svg | images | 200 | 917 ms | 4.0 KB |
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