Performance and delivery

26 procedures covering HTTP/2 and HTTP/3, compression, caching headers, redirect chains, resource size. Out of scope here: load testing at scale, backend profiling.

Checklists

• Caching and CDN review11 checks
• Core Web Vitals audit10 checks
• Web performance checklist14 checks

Questions people ask about this area

• how do i know if my website is served over http or http2
• why is my browser not using http3
• how much does gzip compress a page
• what is the difference between no-cache and must-revalidate
• what is the difference between expires and cache-control
• etag vs expires header
• what is the difference between cache hit and cache miss
• what is the difference between a 301 and a 302 redirect