A 10-point website performance checklist
By Syslabs Team · · updated 22 October 2026
performanceseo

Slow pages lose visitors and rank lower in search. Before paying for a redesign, go through this list.
The checklist
- Test on a phone, on mobile data. Your desktop on office wifi hides the problem.
- Run Lighthouse. In Chrome, open DevTools and select the Lighthouse tab. Aim for 90 or above.
- Resize images. A photo straight from a camera can be 6 MB. Pages rarely need more than 200 KB per image.
- Use modern formats. WebP and AVIF are much smaller than JPEG at the same quality.
- Remove unused plugins and scripts. Each chat widget and tracker adds load time.
- Limit fonts. One or two font files are plenty.
- Turn on caching and compression. Your host should send gzip or Brotli and cache static files.
- Use a CDN if your visitors are in several countries.
- Set image dimensions in the page so content does not jump while loading.
- Check again monthly. Performance drifts as content is added.
Want it built right from the start?
Our showcase websites are built with these rules from day one.
