Panel: Performance... performance
summary
Panel lists actual tools and concrete fixes: Derailed Benchmarks, mini-profiler, New Relic and Chrome throttling, and a memory profiler are used to prove regressions and measure before and after. Advice includes capping Ruby heap growth factor rather than blind GC tweaks, moving expensive DB work into SQL (use delete_all not destroy_all), rolling a new Rails version into a subset of servers to compare metrics, and including benchmarks with PRs to get framework fixes.
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chapters (4)
- 0:00Start
- 23:36find yourself preemptively over optimizing your code for performance
- 29:17refactor before trying to optimize a code path
- 33:06tackle a major performance degradation
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