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

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:

User agent: 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

Browser: Chrome 104

Operating system: Windows

Device Platform: Desktop

Date tested: 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:

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;