Run results for: Array filter vs indexOf - search, add and remove an element

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Browser: Chrome 74

Operating system: Windows 7

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
array.filter	1.1 Ops/sec
array.indexOf	1.0 Ops/sec

Script Preparation code:

var inputSet = [];
for (var i = 0; i < 100000; i++) {
  inputSet.push(Math.floor(Math.random() * 100));
}

Tests:

array.filter
var tempResult = []; inputSet.forEach(function(input) { var stripped = tempResult.filter(function(res) { return res !== input }); if (stripped.length < tempResult.length) { tempResult = stripped; } else { tempResult = tempResult.concat([input]); } });
array.indexOf
var tempResult = []; inputSet.forEach(function(input) { var index = tempResult.indexOf(input); if (index !== -1) { tempResult = tempResult.slice(0, index).concat(tempResult.slice(index + 1)); } else { tempResult = tempResult.concat([input]); } });