Speed, Speed, Speed: JavaScript vs C++ vs WebAssembly

on YouTube ↗27m

" summary

Node.js supports WebAssembly modules and native C++ addons and the benchmark compiles a C++ prime-number algorithm straight to WebAssembly and runs the same algorithm in V8. JavaScript running with V8’s baseline then Turbofan optimizing compiler is about twice as slow as native C++ on the prime-number test; with optimization disabled it balloons (examples show ~80s vs <20s). WebAssembly sits between them, very close to native with only a small call-overhead.

AI-written summary · about

" chapters (9)

1. 0:00Start
2. 3:34WARNING!
3. 7:15PROPERTY LOOKUP
4. 11:11SPECULATIVE OPTIMIZATION
5. 11:32Sourcecode
6. 12:22OPTIMIZING COMPILER
7. 16:49Baseline x86 assembly
8. 21:52WEBASSEMBLY
9. 24:29SPEED, SPEED, SPEED

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