Run results for: Test for loop / reduce / cached loop / cached loop destructive

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
.reduce	26.3 Ops/sec
.for (init array)	31.2 Ops/sec
.for (init array) (cached)	34.2 Ops/sec
.for (init array) (cached) (destructive)	32.8 Ops/sec

Script Preparation code:

function generateTestArray() {
  const result = [];
  for (let i = 0; i < 1000000; ++i) {
    result.push({
      a: i,
      b: i / 2,
      r: 0,
    });
  }
  return result;
}

Tests:

.reduce
const array = generateTestArray(); array.reduce((p, x) => p + x.a + x.b, 0);
.for (init array)
const array = generateTestArray(); const r = new Array(array.length); for (let i = 0; i < array.length; ++i) { r[i] = array[i].a + array[i].b; }
.for (init array) (cached)
const array = generateTestArray(); var arrLen = array.length; const r = new Array(array.length); for (let i = 0; i < arrLen; ++i) { r[i] = array[i].a + array[i].b; }
.for (init array) (cached) (destructive)
const array = generateTestArray(); var arrLen = array.length; const r = new Array(array.length); for (let i = 0; i < arrLen; ++i) { const {a,b} = array[i] r[i] = a + b; }

Run results for: Test for loop / reduce / cached loop / cached loop destructive

.reduce

.for (init array)

.for (init array) (cached)

.for (init array) (cached) (destructive)