TTFB depends on where the speed test is performed

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For PHP sites you should properly manage server-side caching , for example by choosing a WordPress plugin like WP Rocket , to create a static HTML page and reduce server load.

Use a Content Delivery Network (CDN)
A CDN , content delivery network, is only important if your audience is international. You can reduce the content delivery time or if your site has a lot of static resources (images, CSS or JavaScript) and you want to reduce the server load. However, Gtmetrix always reports it as an error.

gtmetrix cdn error
In the basic version of GTmetrix, without logging in, the jordan whatsapp number database tool will run the test as if a user were viewing your site from Canada , without the possibility of changing it. I recommend spending a few minutes and registering

This gives you more accurate tests. To reduce TTFB set the “test server region” field to London so that the server response , simulated in Europe, is faster due to the proximity of the server.

GTmetrix for WordPress, what is it?
The GTmetrix team has created a WordPress plugin that displays the same data as the online tool. It has a widget visible on the dashboard that allows you to constantly monitor the performance of your website. Should you install it? No, it is currently considered unsafe.