Run results for: for-of-foreach

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
foeach	26.9 Ops/sec
forof	40.5 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;
}

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

Tests:

foeach

const array = generateTestArray();

array.forEach((x) => {
   x.r = x.a + x.b;
});

​x
 
const array = generateTestArray();​array.forEach((x) => {   x.r = x.a + x.b;});

forof

const array = generateTestArray();

for (const obj of array) {
  obj.r = obj.a + obj.b;
}

 
const array = generateTestArray();​for (const obj of array) {  obj.r = obj.a + obj.b;}