SC-1st

aggregating.js

[
  { "id": 118748738, "playTime": 12002,   "auto": false },
  { "id": 118805291, "playTime": 17307,   "auto": false },
  { "id": 118801891, "playTime": 15466,   "auto": false },
  { "id": 118793510, "playTime": 5971,    "auto": true  },
  { "id": 118793313, "playTime": 5865,    "auto": false },
  { "id": 118793313, "playTime": 2302,    "auto": false },
  { "id": 118793510, "playTime": 6578,    "auto": false },
  { "id": 118764182, "playTime": 5726,    "auto": false },
  { "id": 118793510, "playTime": 6557,    "auto": false },
  { "id": 118793510, "playTime": 4103,    "auto": false },
  { "id": 118793510, "playTime": 16396,   "auto": false },
  { "id": 118748738, "playTime": 4203,    "auto": false },
  { "id": 118805291, "playTime": 24946,   "auto": false },
  { "id": 118805291, "playTime": 13112,   "auto": false },
  { "id": 118748738, "playTime": 3062,    "auto": false },
  { "id": 118805291, "playTime": 11299,   "auto": false },
  { "id": 118805291, "playTime": 3227,    "auto": false },
  { "id": 118748738, "playTime": 5113,    "auto": true  },
  { "id": 118805291, "playTime": 7186,    "auto": false },
  { "id": 118748738, "playTime": 10609,   "auto": true  },
  { "id": 118748738, "playTime": 3638,    "auto": false },
  { "id": 118805291, "playTime": 5801,    "auto": false },
  { "id": 118801891, "playTime": 2033206, "auto": false },
  { "id": 118805291, "playTime": 5749,    "auto": false },
  { "id": 116687134, "playTime": 4466,    "auto": false },
  { "id": 32124569,  "playTime": 124994,  "auto": false },
  { "id": 116687134, "playTime": 4466,    "auto": false },
  { "id": 32124569,  "playTime": 2355,    "auto": true  },
  { "id": 32124569,  "playTime": 124097,  "auto": false },
  { "id": 116687134, "playTime": 4466,    "auto": false },
  { "id": 32124569,  "playTime": 13493,   "auto": true  },
  { "id": 32124569,  "playTime": 112959,  "auto": false },
  { "id": 116687134, "playTime": 4466,    "auto": false },
  { "id": 32124569,  "playTime": 126453,  "auto": true  },
  { "id": 116687134, "playTime": 4466,    "auto": false },
  { "id": 32124569,  "playTime": 6273,    "auto": true  },
  { "id": 32124569,  "playTime": 120179,  "auto": false },
  { "id": 116687134, "playTime": 4466,    "auto": false },
  { "id": 32124569,  "playTime": 126453,  "auto": true  },
  { "id": 116687134, "playTime": 4466,    "auto": true  },
  { "id": 98491839,  "playTime": 5048,    "auto": true  },
  { "id": 118357426, "playTime": 7221,    "auto": false },
  { "id": 111091415, "playTime": 8682,    "auto": false },
  { "id": 116676275, "playTime": 9050,    "auto": false },
  { "id": 72504949,  "playTime": 6001,    "auto": false },
  { "id": 115286030, "playTime": 7416,    "auto": false },
  { "id": 111091415, "playTime": 6600,    "auto": false },
  { "id": 97604034,  "playTime": 6275,    "auto": false },
  { "id": 97610160,  "playTime": 10820,   "auto": false },
  { "id": 116676275, "playTime": 5833,    "auto": false }
]

// 1st Methodology
var select = (items, options) => {
	if (typeof options.auto === 'undefined') {
		options.auto = false
	}
	const newItemList = items.filter(function(item) {
		for(var key in options) {
			if(item[key] === undefined || item[key] !== options[key]) {
				if (key === 'minPlayTime' && item['playTime'] < options['minPlayTime']) {
					return false
				}
			};
			return item
		}
	})
	return newItemList
}

select(items, { id: 118748738 })
/*
0:{id: 118748738, playTime: 12002, auto: false}
1:{id: 118748738, playTime: 4203, auto: false}
2:{id: 118748738, playTime: 3062, auto: false}
3:{id: 118748738, playTime: 3638, auto: false}
*/

const checkPerf = () => {
  var totalTime,
    start = new Date,
		iterations = 1000;
  while (iterations--) {
    select(items, { id: 118748738 })
  }
  return new Date - start;
}