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Run results for: Comparing different techniques to truncate float-point numbers in JavaScript

Math.trunc(original) ~~original; // Double negation original & -1; // Bitwise AND with -1 original | 0; // Bitwise OR with 0 original ^ 0; // Bitwise XOR with 0 original >> 0; // Bitwise shifting by 0

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Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.102 Safari/537.36 Edg/104.0.1293.63
Chrome 104
Windows
Desktop
2 years ago
Test name Executions per second
Math.trunc() 438931.0 Ops/sec
Double negation 1121380.8 Ops/sec
Bitwise AND with -1 1287382.6 Ops/sec
Bitwise OR with 0 1347989.9 Ops/sec
Bitwise XOR with 0 1277862.6 Ops/sec
Bitwise shifting by 0 1315309.4 Ops/sec
Script Preparation code:
AخA
 
var original = 3.14;
Tests:

  • Math.trunc()

     
    var truncated1 = Math.trunc(original)

  • Double negation

     
    const truncated1 = ~~original;

  • Bitwise AND with -1

     
    const truncated2 = original & -1;

  • Bitwise OR with 0

     
    const truncated3 = original | 0;

  • Bitwise XOR with 0

     
    const truncated4 = original ^ 0;

  • Bitwise shifting by 0

     
    const truncated5 = original >> 0;