Zinn® CacheWordPress cache benchmark: a cached page against an uncached one
Measured time to first byte for one WordPress page on Zinn Digital® hosting with Zinn® Cache: 60 cached hits against 60 requests that bypassed the cache.
The result
| Cached hit | Cache bypassed | |
|---|---|---|
| Median server wait | 40 ms | 107 ms |
| 90th percentile | 47 ms | 119 ms |
| Fastest request | 25 ms | 93 ms |
| Successful samples | 59 | 59 |
| LiteSpeed cache header | hit | miss |
At the median, the cached page started arriving 2.7 times sooner.
Measured on
How it was measured
The page was the home page of a WordPress site running Zinn® Cache 1.3.0 on our LiteSpeed hosting, behind our CDN, about 86 KB of HTML. Requests came from a server in Germany.
Each round made one normal request, which LiteSpeed answered from its cache, and one request with a unique query string, which it could not have cached and so passed to WordPress. Rounds alternated so both sets saw the same network conditions.
The figure is the server wait: the time between the request being sent and the first byte arriving, with DNS, connection and TLS setup taken out. One request in each set did not complete and is excluded rather than counted as fast.
What this does not tell you
This is a small, fast site with few plugins. A site doing more work per page — a large shop, a page builder, dozens of plugins — takes longer to build, so the cached copy saves more. A site that is already slow for other reasons, such as heavy images or third-party scripts, will not become fast from caching alone.
It also measures the server, not the browser. Core Web Vitals depend on what happens after the first byte as well, which is where Zinn® Cache Pro's image, CSS and JavaScript options come in.
Measure your own site
Open your browser's developer tools, reload a page while signed out, and look at the response headers. x-litespeed-cache: hit means the page came from the cache; miss means it was built and is now stored. The guide below walks through it.
WordPress speed test: the same page with Zinn® Cache off and on
Included free with Zinn Digital® hosting
Get Zinn® Cache free on Zinn Digital® hosting
Every WordPress site on our own servers comes with Zinn® Cache installed and connected: the page cache is on, the Redis object cache is managed for you, and plugin updates arrive on their own. Zinn® Cache Pro is not included; add it to any site when you want it.