What number counts as good site performance?

There is no universal number, and a figure quoted from an industry report does not transfer to your site, because it depends on the mix of templates, the number of third-party services, the share of mobile in the audience and the network quality of the market. The workable approach is to set a target per template from your own current distribution and follow the direction of travel rather than an imported figure.

Site Performance

Beginner

Updated Jul 11, 2026 Shahin editorial 2 min read

PronunciationEN/saɪt pərˈfɔːrməns/

Site performance is the speed and stability of a whole site rather than one page, meaning the same measurements read across every page template and every group of users at once.

A site does not have one speed. Home, category, product and article templates differ in weight and structure, and the same template behaves very differently on a mid-range phone on a cellular network than on an office desktop. Reporting a single site-wide average therefore hides exactly the population that needs fixing, and a healthy headline number can sit on top of a template that fails for mobile visitors. The workable unit is a distribution broken down by template and device and read at a percentile, together with availability, because a page that never responds has no speed to measure.

FAQ

Sources:MDN — Web performance