Benchmark: div by 2 vs shift 1 vs mul 0.5

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);

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Browser/OS: Firefox 136 on Windows

Bitwise Shift (>> 1)

24/s

Division (/ 2)

12/s

Multiplication (* 0.5)

12/s

View exact numbers

div by 2 vs shift 1 vs mul 0.5 (version: 1)