Benchmark Run Result for: forEach vs reduce vs for

Script Preparation code:

var arr = [];
for (var i = 0; i < 50000; i++) {
  arr.push(i);
}

Tests:

forEach
var objForEach = {}; arr.forEach(item => { objForEach[item] = { exists: true }; });
reduce
var objReduce = arr.reduce((acc, item) => { acc[item] = { exists: true }; return acc; }, {});
for
var objFor = {}; for (var j = 0; j < arr.length; j++) { var item = arr[j]; objFor[item] = { exists: true }; }