CHECK GLOSSARY · TTFB-001

Slow server response

In plain words: Time to first byte above about 800ms delays everything else on the page.

How to fix it

Cache pages at the edge and speed up server code.

Official sources

• web.dev: TTFB

Related checks

• WWW-001: www and non-www both serve the site
• COMPRESS-001: No text compression
• CACHE-001: Weak browser caching
• SEC-001: Missing security headers

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