Benchmark: Array slice() vs slice(0) vs spread operator vs Array.from

Script Preparation code:

var baseArray = []
for (var i = 0; i < 50; i++) {
  baseArray.push((Math.floor(Math.random() * Math.floor(1000000))).toString(16)) 
}

Tests:

Array.prototype.slice()
var other = baseArray.slice();
spread operator
var other = [ ...baseArray ]
Array.prototype.slice(0)
var other = baseArray.slice(0);
Array.from()
var other = Array.from(baseArray);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.slice()
spread operator
Array.prototype.slice(0)
Array.from()

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser/OS: Firefox 138 on Windows

View result in a separate tab

Array.prototype.slice(0)

5.7M/s

Array.prototype.slice()

5.7M/s

spread operator

1.3M/s

Array.from()

1.2M/s

View exact numbers

Test name	Executions per second
✓ Array.prototype.slice(0)	5,724,952 Ops/sec
Array.prototype.slice()	5,681,192 Ops/sec
spread operator	1,320,724 Ops/sec
Array.from()	1,247,191 Ops/sec

Array slice() vs slice(0) vs spread operator vs Array.from (version: 1)

Compare the new ES6 spread operator with the traditional slice() methods

Comparing performance of: `Array.prototype.slice() vs spread operator vs Array.prototype.slice(0) vs Array.from()`

Created: one year ago by: Guest

Go to the latest result

Array.prototype.slice()

spread operator

Array.prototype.slice(0)

Array.from()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Array slice() vs slice(0) vs spread operator vs Array.from (version: 1)

Compare the new ES6 spread operator with the traditional slice() methods

Comparing performance of: Array.prototype.slice() vs spread operator vs Array.prototype.slice(0) vs Array.from()

Created: one year ago by: Guest

Go to the latest result

Array.prototype.slice()

spread operator

Array.prototype.slice(0)

Array.from()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Array.prototype.slice() vs spread operator vs Array.prototype.slice(0) vs Array.from()`