Run results for: Array loop with cached length

Run details:

User agent: Mozilla/5.0 (Linux; Android 12; SAMSUNG SM-A528B) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/18.0 Chrome/99.0.4844.88 Mobile Safari/537.36

Browser: Chrome Mobile 99

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
With length caching	4983.1 Ops/sec
Without length caching	3328.9 Ops/sec

Script Preparation code:

var arr = [];

for( var cpt = 0; cpt < 1000; cpt++ ) {
  arr.push( Math.random() );
}

var someFn = function( item ) {
  return item * 3 + item / 5;
}

Tests:

With length caching
for( var i = 0, n = arr.length; i < n; i++ ) { someFn( arr[ i ] ); }
Without length caching
for( var i = 0; i < arr.length; i++ ) { someFn( arr[ i ] ); }

Run results for: Array loop with cached length

With length caching

Without length caching