Run results for: forEach vs for ... of

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 134

Operating system: Android

Device Platform: Mobile

Date tested: one month ago

Test name	Executions per second
forEach	5.8 Ops/sec
for of	5.6 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:

forEach
const a = generateTestArray(); a.forEach( b => b*2 );
const a = generateTestArray();
a.forEach( b => b*2 );

for of

const a = generateTestArray();
for ( let b of a) {
  b=b*2;
}

 
const a = generateTestArray();for ( let b of a) {  b=b*2;}