www.isc.org speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 13:32 UTC. Grade B (87/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 140 ms 24%
- TCP connect 44 ms 8%
- Server wait 397 ms 68%
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 580 ms. Everything else waits for that number, so the server is where to start: caching, a slow query, or an overloaded host.
- The page transfers 367.0 KB over 19 request(s). Images files are 66% 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.
- 20% 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 716 ms, inside the 2.5 s Google calls good.
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. 19 request(s) in total, 367.0 KB across all of them.
Top issues
Server response time (TTFB)
high impactThe first byte arrived after 580 ms. Of that, 397 ms was the server thinking and 184 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.
Compress text responses
high impact1 text response(s) of 10 KB or more are sent uncompressed, and the document itself is not compressed. That is 34.5 KB of compressible text.
Fix: Turn on brotli (preferred) or gzip for text/css, javascript and text/html in the web server. This is the cheapest win available on almost any site.
Render-blocking resources
high impact4 render-blocking resource(s) in the document head (1 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.
Avoid extra redirects
medium impact1 redirect hop(s) before the page load started, each one a full round trip before the first byte.
Fix: Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.
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://www.isc.org/images/blog/greenaurora.jpg | images | 200 | 1.27 s | 3.4 KB |
| https://www.isc.org/images/stork80x.png | images | 200 | 1.10 s | 6.0 KB |
| https://www.isc.org/images/blog/bind9label.jpg | images | 200 | 1.08 s | 2.9 KB |
| https://www.isc.org/scss/style.min.css | css | 200 | 999 ms | 4.7 KB |
| https://www.isc.org/plugins/modernizr/modernizr-custom.js | javascript | 200 | 994 ms | 3.3 KB |
| https://www.isc.org/images/favicon.ico | images | 200 | 963 ms | 138.7 KB |
| https://www.isc.org/images/logo.png | images | 200 | 952 ms | 9.6 KB |
| https://www.isc.org/js/bundle.js | javascript | 200 | 925 ms | 34.5 KB |
| https://www.isc.org/images/blog/net.jpg | images | 200 | 913 ms | 33.2 KB |
| https://www.isc.org/images/dhcp.png | images | 200 | 872 ms | 5.7 KB |
| https://www.isc.org/images/kea.png | images | 200 | 815 ms | 12.6 KB |
| https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js 3rd party | javascript | 200 | 791 ms | 29.7 KB |
| https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js 3rd party | javascript | 200 | 754 ms | 6.3 KB |
| https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js 3rd party | javascript | 200 | 722 ms | 14.1 KB |
| https://cdn.jsdelivr.net/gh/lykmapipo/[email protected]/css/themify-icons.css 3rd party | css | 200 | 710 ms | 2.8 KB |
| https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css 3rd party | css | 200 | 708 ms | 21.7 KB |
| https://www.isc.org/images/bind9.png | images | 200 | 704 ms | 11.4 KB |
| https://www.isc.org/images/blog/Storklabel.jpg | images | 200 | 694 ms | 20.3 KB |
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