Run results for: Reduce vs map/join

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/87.0.4280.77 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 87

Operating system: iOS 14.4

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
for	5206.7 Ops/sec
reduce	23483.1 Ops/sec
map	14718.2 Ops/sec
for of	95460.7 Ops/sec

Script Preparation code:

var strings = [];
for (var i=0; i<1000; i++) {
  strings[i] = ""+i+i;
}

Tests:

for
var result = ""; for (var i=0; i<strings.length; i++) { result = result+' x-'+strings[i]; }
reduce
var result = strings.reduce(function(string, i) { return string+' x-'+i; }, ""); result=result.substring(1);
map
var result = strings.map(function(i) { return 'x-'+i; }).join(' ');
for of
var result = ""; for (var i of strings) { result += ' x-'+i; }

Run results for: Reduce vs map/join

for

reduce

map

for of