The Life-Changing Magic of Tidying Active...
summary
Uses memory profiler and derailed benchmarks to collect allocations, finds ActiveRecord respond_to allocating strings and replaces it with a symbol→string hash to cut allocations ~1% and speed web requests ~1.01x. Finds time-parsing hot path, avoids needless Time allocation to cut allocations ~5% and speed requests ~1.23x (claimed equivalent to ~19 fewer servers). Builds a caller-aggregation tool (Whence) to prioritize fixes from real backtraces.
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chapters (6)
- 0:00Start
- 0:14Pain Free Rails 66 Deployments
- 4:47TIDYING UP Active Record
- 8:35malloc is slow
- 10:34Bytes reduced is a consistent metric
- 12:08gem install derailed benchmarks
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