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Run results for:
div by 2 vs shift 1 vs mul 0.5
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<iframe src="https://measurethat.net/Embed?id=596204" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0
Browser:
Firefox 136
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Division (/ 2)
11.9 Ops/sec
Bitwise Shift (>> 1)
23.7 Ops/sec
Multiplication (* 0.5)
11.9 Ops/sec
Tests:
Division (/ 2)
function testDivision(iterations) { let x = 123456; console.time('Division (/ 2)'); for (let i = 0; i < iterations; i++) { x = x / 2; } console.timeEnd('Division (/ 2)'); } testDivision(100000000);
Bitwise Shift (>> 1)
function testBitwiseShift(iterations) { let x = 123456; console.time('Bitwise Shift (>> 1)'); for (let i = 0; i < iterations; i++) { x = x >> 1; } console.timeEnd('Bitwise Shift (>> 1)'); } testBitwiseShift(100000000);
Multiplication (* 0.5)
function testMultiplication(iterations) { let x = 123456; console.time('Multiplication (* 0.5)'); for (let i = 0; i < iterations; i++) { x = x * 0.5; } console.timeEnd('Multiplication (* 0.5)'); } testMultiplication(100000000);