Run results for: Reduce vs map/join with existing strings on an object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36

Browser: Yandex Browser 25

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 10 months ago

reduce

133K/s

for

114K/s

map

56K/s

for of

27K/s

View exact numbers

Script Preparation code:

var strings = [];
for (var i=0; i<1000; i++) {
  strings[i] = { name: 'test' + i };
}

Tests:

for
var result = ""; for (var i=0; i<strings.length; i++) { result = result+';;'+strings[i].name; } result=result.substring(2);
reduce
var result = strings.reduce(function(string, i) { return string+';;'+i.name; }, ""); result=result.substring(2);
map
var result = strings.map(function(i) { return i.name; }).join(';;');
for of
var result = ""; for (var i of strings) { result += ';;' + i; }