HTTP/2 and HTTP/3 Performance Guide

Learn how HTTP/2 and HTTP/3 improve website performance with multiplexing, server push, and reduced latency. Migration guide included.

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HTTP/2 Benefits

  • Multiplexing - Multiple requests over single connection
  • Header compression - Reduces overhead
  • Server push - Proactively send resources
  • Stream prioritization - Load important resources first

HTTP/3 Improvements

HTTP/3 uses QUIC instead of TCP, eliminating head-of-line blocking and reducing connection establishment time. It's especially beneficial on unreliable networks.

Frequently Asked Questions

Less so. HTTP/2's multiplexing reduces the penalty of multiple requests. However, too many small files still have overhead. Find a balance.
Most CDNs support HTTP/2 and HTTP/3 automatically. For your origin server, check your web server configuration (nginx, Apache) or hosting provider.

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