Matan · SEO · Performance

Response compression

Same as technical compression, scored again because it directly changes transfer time.

Pass condition in our engine: Content-Encoding includes gzip, br or zstd.

1. Problem description

If HTML is not compressed, every extra kilobyte is paid at text rates. Brotli typically beats gzip for HTML. CDNs can compress even when the origin does not.

2. Most common causes

  • Compression enabled only for static assets, not HTML.
  • Content-Encoding stripped by a proxy.

3. How to fix it

  1. Enable brotli or gzip for text/html.
  2. Confirm in response headers after a hard refresh.

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