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David Heinemeier Hansson
659f95748a
* Preload only uncached messages and reduce rendering overhead * Keep benchmark summaries without raw JSON results * Use Ruby benchmark drivers and keep generated results out of the repo
27 lines
1.5 KiB
Markdown
27 lines
1.5 KiB
Markdown
# Message benchmarks
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The drivers use Ruby's standard library and Docker; no separate load generator is required.
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Provide a frozen baseline source directory, an isolated seed containing `db/`, `storage/`
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and `labels.json`, and a matching application image with compiled assets.
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```sh
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ruby bench/compare_message_hot_paths.rb --baseline PATH --baseline-ref SHA --seed SEED
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ruby bench/compare_http.rb --baseline PATH --seed SEED
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ruby bench/compare_http.rb --baseline PATH --seed SEED --paths sidebar,search --concurrencies 16 --duration 10
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```
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Both drivers alternate before/after order and reset fixture storage for each run.
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Results default to ignored `tmp/rails-optimization/results/`; override with `--output PATH`.
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Use `--image` to override `campfire-reference:app`, and `--cpus` to override server CPUs
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`8-11`. HTTP clients use CPUs `12-15` by default (`--client-cpus`). `--help` lists options.
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The rendering probe checks exact response bodies, selected headers and unread payloads,
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and records timing, queries and allocations with MemoryStore, frozen time and fixture-only
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CSRF disabling. Unread fanout excludes adapter I/O.
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The HTTP driver uses production Puma/Redis with one worker and five threads. Ruby threads
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each maintain a keep-alive connection, request uncompressed responses, and consume the
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whole body. Login uses normal CSRF protection; all warmup and measured responses must be
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HTTP 200 without transport errors. Measurements exclude Thruster, TLS and gzip. Client
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CPU, JIT warmup and GC can affect throughput; repeat runs and check client saturation.
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