Run results for: loop count

Test name	Executions per second
✓ foreach	12,052,115 Ops/sec
for	11,850,707 Ops/sec
filter	11,347,685 Ops/sec

filter

var obj1 = {test1: [{prop1: 'test1', enabled: true}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: true}], test2: [{prop1: 'test1', enabled: false}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: true}, {prop1: 'test4', enabled: true}], test3: [{prop1: 'test1', enabled: false}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: false}, {prop1: 'test4', enabled: true}, {prop1: 'test4', enabled: false}]};
var count = 0;
for(var key in obj1) {
  if(obj1.hasOwnProperty(key)){
    count += obj1[key].filter(p => p.enabled).length;
  }
}

foreach

var obj1 = {test1: [{prop1: 'test1', enabled: true}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: true}], test2: [{prop1: 'test1', enabled: false}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: true}, {prop1: 'test4', enabled: true}], test3: [{prop1: 'test1', enabled: false}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: false}, {prop1: 'test4', enabled: true}, {prop1: 'test4', enabled: false}]};
var count = 0;
for(var key in obj1) {
  if(obj1.hasOwnProperty(key)){
    obj1[key].forEach(p => {
    	if(p.enabled) {
          ++count;
        }
    })
  }
}

for

var obj1 = {test1: [{prop1: 'test1', enabled: true}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: true}], test2: [{prop1: 'test1', enabled: false}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: true}, {prop1: 'test4', enabled: true}], test3: [{prop1: 'test1', enabled: false}, {prop1: 'test2', enabled: false}, {prop1: 'test3', enabled: false}, {prop1: 'test4', enabled: true}, {prop1: 'test4', enabled: false}]};
var count = 0;
for(var key in obj1) {
  if(obj1.hasOwnProperty(key)){
    for(var i = 0; i < obj1[key].length; i++) {
        if(obj1[key][i].enabled) {
           ++count;
        }
    }
  }
}