Run results for: Array vs Float32Array vs Float64Array multiplication

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36

Browser: Chrome 133

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one month ago

Test name	Executions per second
Plain array	21286.1 Ops/sec
Float32 Array	1497.4 Ops/sec
Float64 Array	1544.5 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];
}

​x
 
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];
}

 
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];
}

 
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];
}

 
let a = 0;for (let i = 1; i < window.len; i++) {  a = window.f64[i] * window.f64[i - 1];}