Benchmark: array creation (Array vs Array.from)

HTML Preparation code:

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Script Preparation code:

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async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

Array(1_000_000).fill(null)
const array = Array(1_000_000).fill(null);
new Array(1_000_000).fill(null)
const array = new Array(1_000_000).fill(null);
Array.from({ length: 1_000_000 }).fill(null)
const array = Array.from({ length: 1_000_000 }).fill(null)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array(1_000_000).fill(null)
new Array(1_000_000).fill(null)
Array.from({ length: 1_000_000 }).fill(null)

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 11 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36

Browser/OS: Chrome 152 on Mac OS X 10.15.7

View result in a separate tab

Array(1_000_000).fill(null)

2K/s

new Array(1_000_000).fill(null)

2K/s

Array.from({ length: 1_000_000 }).fill(null)

63/s

View exact numbers

Test name	Executions per second
✓ Array(1_000_000).fill(null)	1,741 Ops/sec
new Array(1_000_000).fill(null)	1,739 Ops/sec
Array.from({ length: 1_000_000 }).fill(null)	63 Ops/sec

array creation (Array vs Array.from) (version: 1) Benchmark.js

Comparing performance of: `Array(1_000_000).fill(null) vs new Array(1_000_000).fill(null) vs Array.from({ length: 1_000_000 }).fill(null)`

Created: 11 days ago by: Guest

Go to the latest result

Array(1_000_000).fill(null)

new Array(1_000_000).fill(null)

Array.from({ length: 1_000_000 }).fill(null)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

array creation (Array vs Array.from) (version: 1) Benchmark.js

Comparing performance of: Array(1_000_000).fill(null) vs new Array(1_000_000).fill(null) vs Array.from({ length: 1_000_000 }).fill(null)

Created: 11 days ago by: Guest

Go to the latest result

Array(1_000_000).fill(null)

new Array(1_000_000).fill(null)

Array.from({ length: 1_000_000 }).fill(null)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Array(1_000_000).fill(null) vs new Array(1_000_000).fill(null) vs Array.from({ length: 1_000_000 }).fill(null)`