Run results for: CompareFor20190430

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0

Browser: Firefox 66

Operating system: Ubuntu

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; }