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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36

Browser: Chrome 150

Operating system: Windows

Device Platform: Desktop

Date tested: 5 days ago

arrayFromSmallSet

5.2M/s

arrayFromSmallArray

4.7M/s

arraySpreadSmallSet

4.6M/s

arraySpreadSmallArray

4.3M/s

arraySpreadSmallIterable

3.5M/s

arrayFromSmallIterable

3.3M/s

arrayFromBigSet

8K/s

arrayFromBigArray

7K/s

arrayFromBigIterable

6K/s

arraySpreadBigSet

6K/s

arraySpreadBigArray

5K/s

arraySpreadBigIterable

4K/s

View exact numbers

Test name	Executions per second
✓ arrayFromSmallSet	5,224,448 Ops/sec
arrayFromSmallArray	4,682,552 Ops/sec
arraySpreadSmallSet	4,648,334 Ops/sec
arraySpreadSmallArray	4,267,810 Ops/sec
arraySpreadSmallIterable	3,542,641 Ops/sec
arrayFromSmallIterable	3,348,430 Ops/sec
arrayFromBigSet	8,060 Ops/sec
arrayFromBigArray	7,421 Ops/sec
arrayFromBigIterable	5,559 Ops/sec
arraySpreadBigSet	5,509 Ops/sec
arraySpreadBigArray	5,166 Ops/sec
arraySpreadBigIterable	4,270 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()];