Run results for: Math.pow vs for loop for integer powers

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 15

Operating system: iOS 15.0

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Math.pow	700.9 Ops/sec
MYpow	730.1 Ops/sec
MYpow2	1360.3 Ops/sec

HTML Preparation code:


<div id='aaa1'></div>

Script Preparation code:

function MYpow(dddn1,dddn2){
  var dddn3=1;
  while(dddn2>0){
    dddn3*=dddn1;dddn2--;
  }
  return dddn3;
}
function MYpow2(dddn1,dddn2){
  var dddn3=1;
  while(dddn2>0){
    if(dddn2-dddn2^1){dddn3*=dddn1;dddn1*=dddn1;}
    dddn2=dddn2>>1;
  }
  return dddn3;
}

Tests:

Math.pow
var x=[]; for(var i=0;i<77;i++){ for(var i2=0;i2<77;i2++){ x.push(Math.pow(i,i2)); } } document.getElementById("aaa1").innerHTML=x;
MYpow
var x=[]; for(var i=0;i<77;i++){ for(var i2=0;i2<77;i2++){ x.push(MYpow(i,i2)); } } document.getElementById("aaa1").innerHTML=x;
MYpow2
var x=[]; for(var i=0;i<77;i++){ for(var i2=0;i2<77;i2++){ x.push(MYpow2(i,i2)); } } document.getElementById("aaa1").innerHTML=x;