JavaScript at the Speed of Light
summary
Describes a statically constrained JavaScript subset that achieves near‑C++ numeric performance by removing runtime polymorphism and GC assumptions so engines can emit direct loads/stores. Implements typed numeric arrays, sealed classes, and hidden-class stability via a transpiler; prototypes landed in V8 and SpiderMonkey behind flags and benchmarks show large speedups for tight numeric loops while general JavaScript behavior is unchanged.
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chapters (9)
- 0:00Introduction
- 1:30V8 hidden classes
- 7:31Array optimization
- 15:40Language limits
- 27:22Strict Mode typing
- 36:21Strict Mode in web dev
- 41:37Strict Mode vs TypeScript/Dart
- 48:17Strict Mode adoption
- 51:28Current developments
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