Benchmark: for vs for (reverse) vs forEach vs every

Script Preparation code:

function generateTestArray() {
	var result = [];

	for (let i = 0; i < 1000; ++i) {
		result.push({
			a: i,
			b: i / 2,
			r: 0,
		});
	}

	return result;
}

var array = generateTestArray();

Tests:

for
for (var i = 0; i < array.length; i++) { let r = array[i]; }
for (with length)
var length = array.length; for (var i = 0; i < length; i++) { let r = array[i]; }
for (reverse)
for (var i = array.length; --i >= 0;) { let r = array[i]; }
for (reverse with length)
var length = array.length; for (var i = length; --i >= 0;) { let r = array[i]; }
forEach
array.forEach(function(i) { let r = array[i]; });
every
array.every(function(i) { let r = array[i]; return true; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
for
for (with length)
for (reverse)
for (reverse with length)
forEach
every

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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Windows

View result in a separate tab

Test name	Executions per second
for	11843.9 Ops/sec
for (with length)	23757.0 Ops/sec
for (reverse)	22741.8 Ops/sec
for (reverse with length)	23407.8 Ops/sec
forEach	12690.3 Ops/sec
every	11902.8 Ops/sec

for vs for (reverse) vs forEach vs every (version: 14)

Comparing performance of: for vs for (with length) vs for (reverse) vs for (reverse with length) vs forEach vs every

Created: 2 years ago by: Registered User

Jump to the latest result

for

for (with length)

for (reverse)

for (reverse with length)

forEach

every

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A