Brotli vs gzip: -17% bytes vs CPU at level 11

Brotli vs gzip: -17% bytes vs CPU at level 11
Brotli compresses text better. The cost is encode CPU, so the level matters.
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Brotli vs gzip on JS/CSS/HTML: ~15-25% smaller at comparable settings. A 200KB gzip bundle -> ~165KB Brotli.
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Brotli level 11: best ratio but slow encode. Fine for static assets compressed once at build.
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For dynamic HTML, Brotli level 4-5 matches gzip speed and still beats its ratio.
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Never Brotli-11 on per-request dynamic responses; the CPU stall adds TTFB.
Takeaway: static assets Brotli-11; dynamic HTML Brotli-4, never gzip if Brotli is available.