Run results for: Array vs Float32Array vs Float64Array multiplication

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Plain array

70/s

Float64 Array

50/s

Float32 Array

50/s

View exact numbers

Test name	Executions per second
✓ Plain array	70 Ops/sec
Float64 Array	50 Ops/sec
Float32 Array	50 Ops/sec

Script Preparation code:

const len = 16384;
window.len = len;
window.arr = new Array(len);
window.f32 = new Float32Array(len);
window.f64 = new Float64Array(len);
for (let i = 0; i < len; i++) {
  window.arr[i] = Math.random() * 2048;
  window.f32 = Math.fround(window.arr[i]);
  window.f64 = window.arr[i];
}

Tests:

Plain array
let a = 0; for (let i = 1; i < window.len; i++) { a = window.arr[i] * window.arr[i - 1]; }
Float32 Array
let a = 0; for (let i = 1; i < window.len; i++) { a = window.f32[i] * window.f32[i - 1]; }
Float64 Array
let a = 0; for (let i = 1; i < window.len; i++) { a = window.f64[i] * window.f64[i - 1]; }