Measuring the True Cost of Abstractions in JavaScript
summary
Compares performance of JavaScript abstractions like reduce, map, forEach across different datasets by building a three-level analysis: inspect V8 source (Torque and C++), examine the generated bytecode, and then run measurements with Benchmark. Presents concrete comparisons of how various JS methods handle the same tasks in terms of speed.
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chapters (11)
- 0:00Introduction
- 2:48Disclaimer
- 6:04Quiz results
- 13:54Spread vs Object.assign
- 14:16indexOf is slow
- 20:57find is slow
- 21:17For vs find vs includes
- 25:12V8 optimizes built-ins
- 35:32Real data tests
- 37:42Optimization tips
- 38:04Q&A
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