Run results for: for vs foreach vs some vs every vs for..of vs map with mutation fixing bug with every - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser: Chrome 110

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for	91638.2 Ops/sec
foreach	78818.8 Ops/sec
some	79850.5 Ops/sec
every	80009.1 Ops/sec
for..of	77287.8 Ops/sec
map	3452590.0 Ops/sec

Website performance monitoring

Script Preparation code:

var array = new Array(100);

Tests:

for
for (var i = 0; i < array.length; i++) { array[i] = array[i] * 2; }
foreach
array.forEach(function(i) { array[i] = array[i] * 2; });
some
array.some(function(i) { array[i] = array[i] * 2; });
every
array.every(function(i) { array[i] = array[i] * 2; return true });
for..of
for (var i of array) { array[i] = array[i] * 2; }
map
array.map(a => a * 2);