Benchmark: Array loop with cached length

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 ] ); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
With length caching
Without length caching

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

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/OS: Chrome Mobile 99 on Android

View result in a separate tab

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

Array loop with cached length (version: 0)

Comparing performance of: With length caching vs Without length caching

Created: one year ago by: Registered User

Jump to the latest result

With length caching

Without length caching

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A