Run results for: Array.from(iterable) vs [...iterable]

Run details:

User agent: Mozilla/5.0 (Linux; Android 15; 23124RA7EO Build/AQ3A.240829.003; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/150.0.7871.181 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/572.0.0.41.89;]

Browser: Chrome Mobile 150

Operating system: Android

Device Platform: Mobile

Date tested: 3 days ago

arraySpreadSmallArray

20.7M/s

arrayFromSmallArray

16.1M/s

arraySpreadSmallSet

12.0M/s

arrayFromSmallSet

10.7M/s

arraySpreadSmallIterable

879K/s

arrayFromSmallIterable

840K/s

arraySpreadBigArray

198K/s

arrayFromBigArray

191K/s

arrayFromBigSet

21K/s

arraySpreadBigSet

20K/s

arrayFromBigIterable

1K/s

arraySpreadBigIterable

1K/s

View exact numbers

Test name	Executions per second
✓ arraySpreadSmallArray	20,661,498 Ops/sec
arrayFromSmallArray	16,064,812 Ops/sec
arraySpreadSmallSet	11,998,286 Ops/sec
arrayFromSmallSet	10,707,063 Ops/sec
arraySpreadSmallIterable	879,149 Ops/sec
arrayFromSmallIterable	840,195 Ops/sec
arraySpreadBigArray	198,339 Ops/sec
arrayFromBigArray	191,197 Ops/sec
arrayFromBigSet	20,617 Ops/sec
arraySpreadBigSet	20,422 Ops/sec
arrayFromBigIterable	1,328 Ops/sec
arraySpreadBigIterable	1,093 Ops/sec

Script Preparation code:

const smallArray = new Array();
const smallSet = new Set();
for (let i = 0; i < 10; ++i) {
	smallArray.push(i);
  smallSet.add(i)
}
const smallIterable = function*() {
  for (let i = 0; i < 10; ++i) {
    yield i;
  }
}

const bigArray = new Array();
const bigSet = new Set();
for (let i = 0; i < 10000; ++i) {
	bigArray.push(i);
  bigSet.add(i)
}
const bigIterable = function*() {
  for (let i = 0; i < 10000; ++i) {
    yield i;
  }
}

Tests:

arrayFromSmallArray
const arrayFromSmallArray = Array.from(smallArray);
arrayFromSmallSet
const arrayFromSmallSet = Array.from(smallSet);
arrayFromSmallIterable
const arrayFromSmallIterable = Array.from(smallIterable());
arraySpreadSmallArray
const arraySpreadSmallArray = [...smallArray];
arraySpreadSmallSet
const arraySpreadSmallSet = [...smallSet];
arraySpreadSmallIterable
const arraySpreadSmallIterable = [...smallIterable()];
arrayFromBigArray
const arrayFromBigArray = Array.from(bigArray);
arrayFromBigSet
const arrayFromBigSet = Array.from(bigSet);
arrayFromBigIterable
const arrayFromBigIterable = Array.from(bigIterable());
arraySpreadBigArray
const arraySpreadBigArray = [...bigArray];
arraySpreadBigSet
const arraySpreadBigSet = [...bigSet];
arraySpreadBigIterable
const arraySpreadBigIterable = [...bigIterable()];