Run results for: Float32 vs Float64 vs Array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

set f32

7K/s

set f64

3K/s

iterate and set array

273/s

iterate and set f32

256/s

iterate and set f64

246/s

View exact numbers

Test name	Executions per second
✓ set f32	6,732 Ops/sec
set f64	2,853 Ops/sec
iterate and set array	273 Ops/sec
iterate and set f32	256 Ops/sec
iterate and set f64	246 Ops/sec

Script Preparation code:

var length = 1e6;

var f32_a = Float32Array.from({length}, Math.random);
var f32_b = Float32Array.from({length}, Math.random);

var f64_a = Float64Array.from({length}, Math.random);
var f64_b = Float64Array.from({length}, Math.random);

var arr_a = Array.from({length}, Math.random);
var arr_b = Array.from({length}, Math.random);

Tests:

set f32
f32_a.set(f32_b);
set f64
f64_a.set(f64_b);
iterate and set f32
for (let i = 0; i < length; i++) { f32_a[i] = f32_b[i]; }
iterate and set f64
for (let i = 0; i < length; i++) { f64_a[i] = f64_b[i]; }
iterate and set array
for (let i = 0; i < length; i++) { arr_a[i] = arr_b[i]; }