MeasureThat.net

Run results for: bitwise operator vs. boolean logic when using TypedArrays

Bitwise operators are slow in javascript because there is implicit type conversion between floats and ints. If we use TypedArrays though, javascript engines shouldn't have to convert. But do they? This test is here to find out. We'll also check to see whether conversion is performed between another int-like datatypes, Uint32

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36
Chrome 72
Mac OS X 10.13.6
Desktop
5 years ago
Test name Executions per second
bitwise operator on Int32Array 303.5 Ops/sec
boolean operator on Int32Array 299.7 Ops/sec
boolean operator with comparitors on Int32Array 311.3 Ops/sec
bitwise operator on Float32Array 307.6 Ops/sec
bitwise operator on Uint32Array 325.1 Ops/sec
boolean operator on Uint32Array 329.0 Ops/sec
boolean operator on Uint32Array with comparators 327.0 Ops/sec
Script Preparation code:
Tests:

  • bitwise operator on Int32Array

  • boolean operator on Int32Array

  • boolean operator with comparitors on Int32Array

  • bitwise operator on Float32Array

  • bitwise operator on Uint32Array

  • boolean operator on Uint32Array

  • boolean operator on Uint32Array with comparators

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