Evilmartians iconEvilmartiansAug 19, 2026 ~1 min source read

Get in, human: cut Rails boot time with require-profiler and this guide

Rails, DX, Performance, Ruby Rails boot time is a DX metric in the AI age: meet require-profiler, learn to actually read sampling profilers, and see the pit stop that cut a 200-component monolith's boot by 40%. Every Rails app race starts the same: load code, read config, then the green flag.

Get in, human: cut Rails boot time with require-profiler and this guide
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Rails, DX, Performance, Ruby Rails boot time is a DX metric in the AI age: meet require-profiler, learn to actually read sampling profilers, and see the pit stop that cut a 200-component monolith's boot by 40%.

Every Rails app race starts the same: load code, read config, then the green flag.

The bigger the app, the more startup drags on deploys, CI, and developer patience.

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The useful part

Rails, DX, Performance, Ruby Rails boot time is a DX metric in the AI age: meet require-profiler, learn to actually read sampling profilers, and see the pit stop that cut a 200-component monolith's boot by 40%. Every Rails app race starts the same: load code, read config, then the green flag. The bigger the app, the more startup drags on deploys, CI, and developer patience.

How it works

  • This is doubly so as AI agents boot your app far more often than humans do.
  • Thus, meet require-profiler, a new one-stop profiler for Ruby's code loading process!

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