Benchmark: indexOf vs map - MeasureThat.net

Script Preparation code:

function hasWithIndexOf(needle, haystack) {
	return haystack.indexOf(needle) !== -1;
}

function hasWithMapForEach(needle, haystack) {
	var map = {};
	haystack.forEach(item => map[item] = true);
	return map[needle];
}

function hasWithMapLoop(needle, haystack) {
	var map = {};
	for (var i=0, len=haystack.length; i<len; ++i) {
    	map[haystack[i]] = true;
    }
	return map[needle];
}
         
var testArray = [];
for (var i=0; i<100; ++i) {
  	testArray.push('00' + i);
}

Tests:

indexOf
for (var i=0; i<100; ++i) { hasWithIndexOf('404', testArray); }
map with forEach
for (var i=0; i<100; ++i) { hasWithMapForEach('404', testArray); }
map with loop
for (var i=0; i<100; ++i) { hasWithMapLoop('404', testArray); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
indexOf
map with forEach
map with loop

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
indexOf	28422.4 Ops/sec
map with forEach	1565.8 Ops/sec
map with loop	1336.7 Ops/sec

indexOf vs map (version: 0)

Comparing performance of: indexOf vs map with forEach vs map with loop

Created: 7 years ago by: Guest

Jump to the latest result

indexOf

map with forEach

map with loop

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A