Benchmark Run Result for: Caching length property vs getting it each time in the loop

Caching length property vs getting it each time in the loop

save length of the array in the variable vs get it the loop

Date tested: 11 months ago

User agent: Mozilla/5.0 (iPhone14,3; U; CPU iPhone OS 15_0 like Mac OS X) AppleWebKit/602.1.50 (KHTML, like Gecko) Version/10.0 Mobile/19A346 Safari/602.1

Test name	Executions per second
123456	123456.0 Ops/sec
123456	123456.0 Ops/sec

Benchmark definition (click to collapse):

Script Preparation code:

var arr = [];
var count = 1000;
for(var i = 0; i<count; i++)
{
  arr.push(i);
}

Tests:

Cache length
var arrLen = arr.length; var sum = 0; for (var i = 0; i < arrLen; i++){ sum = arr[i]; }
Do not cache
var sum = 0; for (var i = 0; i < arr.length; i++){ sum = arr[i]; }

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