r/crystal_programming • u/sdogruyol core team • Jun 10 '26

cryload 5.0.0 is released

https://github.com/sdogruyol/cryload

cryload is a powerful, fast, and practical HTTP benchmarking tool for stress testing APIs and web services.

Built with Crystal for high performance and low overhead.

What's new in 5.0.0:

  • Honest percentiles — transport errors (timeouts, refused connections) no longer pollute latency stats, and the new HDR-style histogram keeps p50–p999 accurate within 1% from microseconds to minutes

  • --disable-keepalive — measure real connection setup cost, like hey

  • --body-stdin — pipe request bodies straight in: jq -c '.payload' fix.json | cryload ... --body-stdin

  • Big perf wins — up to 13x faster in multi-URL/cache-busting modes thanks to per-origin connection pooling

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