Run results for: CompareFor20190430

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.108 Safari/537.36

Browser: Chrome 74

Operating system: Linux

Device Platform: Desktop

Date tested: 5 years ago

Script Preparation code:

var saved = new Array(1000).fill(null).map((v, item) => ({item}));

Tests:

for
var savedMap = {}; for (var i = 0; i < saved.length; i++) { savedMap[saved[i].item] = saved[i]; }
forEach
var savedMap = {}; saved.forEach(item => { savedMap[item.item] = item; });
for optimized 1
var savedMap = {}; for (var i = 0, l = saved.length; i < l; i++) { savedMap[saved[i].item] = saved[i]; }
for optimized 2
var savedMap = {}; for (var i = 0, l = saved.length; i < l; i++) { var item = saved[i]; savedMap[item.item] = item; }