Keynote: Aaron Patterson
summary
Proposes concrete fixes and measurements: implements a proof‑of‑concept for automatic parallel testing (one‑DB approach yields ~0–15% gain; multi‑DB still untested), precompiles cached views to save memory, and merges controller tests into faster integration tests using profiling with stackprof (integration initially 2.4× slower, patched delegate calls drop that to ~1.45× and overall to ~10% slower; example 26s → 16s). Measures bundler/gem behavior with R, finds linear growth, shows a 50s → 600ms win by targeted spec lookup, and advocates precomputed spec manifests and file manifests to make require constant time.
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chapters (14)
- 0:00Start
- 22:44Benchmark
- 23:30Controller Bottleneck
- 24:44View Stack
- 26:00Time the process
- 26:48Stack (CPU)
- 29:08Patch
- 32:28bin stub source code
- 34:01Load Path Manipulation
- 41:08bundle update time
- 44:50R Code - Coefficients
- 45:21Make Predictions
- 47:22Spec loading code today
- 48:38Spec loading code I want
