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 = ['001', '002', '003', '004', '005', '006', '007', '008', '009', '010', '011', '012', '013', '014', '015', '016', '017', '018', '019', '020'];

Tests:

indexOf
for (var i=0; i<100; ++i) { hasWithIndexOf('000', testArray); }
map with forEach
for (var i=0; i<100; ++i) { hasWithMapForEach('000', testArray); }
map with loop
for (var i=0; i<100; ++i) { hasWithMapLoop('000', 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: 7 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0

Browser/OS: Firefox 50 on Windows 7

View result in a separate tab

Test name	Executions per second
indexOf	60637.6 Ops/sec
map with forEach	3073.0 Ops/sec
map with loop	2534.5 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