Benchmark: Create Square 2D Array

Script Preparation code:

var size = 15;

Tests:

While Loop with declaration
const array = []; array.length = size; let index = array.length; while (index-- > 0) { const temp = []; temp.length = size; array[index] = temp; }
While Loop with Slice
const array = []; array.length = size; let index = array.length; const temp = []; temp.length = size; while (index-- > 0) array[index] = temp.slice(0);
While Loop with Push and Slice
const array = []; array.length = size; let index = array.length; const temp = []; temp.length = size; while (index-- > 0) array.push(temp.slice(0));
While Loop with Push
const array = []; array.length = size; let index = size; while (index-- > 0) { const temp = []; temp.length = size; array.push(temp); }
Array.from with map
const array = Array.from(Array(size), () => { const temp = []; temp.length = size; return temp; });
Array.from with map and slice
const temp = []; temp.length = size; const array = Array.from(temp, () => temp.slice());

Rendered benchmark preparation results:

Previous results

Test case name	Result
While Loop with declaration
While Loop with Slice
While Loop with Push and Slice
While Loop with Push
Array.from with map
Array.from with map and slice

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser/OS: Chrome 87 on Windows

Test name	Executions per second
While Loop with declaration	285314.0 Ops/sec
While Loop with Slice	1484855.0 Ops/sec
While Loop with Push and Slice	1377483.0 Ops/sec
While Loop with Push	282811.1 Ops/sec
Array.from with map	225431.3 Ops/sec
Array.from with map and slice	667623.4 Ops/sec

Create Square 2D Array (version: 0)