Benchmark: Reduce array4 - MeasureThat.net

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var arr = Array(10_000).fill(1)

Tests:

Reduce with empty erray
arr.reduce((acc, x) => { acc.push(x); return acc; }, []);
Reduce with filled array
arr.reduce((acc, x, index) => { acc[index] = x; return acc; }, new Array(arr.length));
Reduce with filled array with null
arr.reduce((acc, x, index) => { acc[index] = x; return acc; }, new Array(arr.length).fill(null));
Reduce with new Array
arr.reduce((acc, x, index) => { acc[index] = x; return acc; }, new Array());
Reduce with var
const a = new Array(arr.length); arr.reduce((acc, x, index) => { acc[index] = x; return acc; }, a);
Reduce with var []
const a = []; arr.reduce((acc, x, index) => { acc.push(x) return acc; }, a);
Reduce with var [] assign by index
const a = []; arr.reduce((acc, x, index) => { acc[index] = x; return acc; }, a);

Rendered benchmark preparation results:

Previous results

Test case name	Result
Reduce with empty erray
Reduce with filled array
Reduce with filled array with null
Reduce with new Array
Reduce with var
Reduce with var []
Reduce with var [] assign by index

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser/OS: Chrome 130 on Mac OS X 10.15.7

Test name	Executions per second
Reduce with empty erray	10601.3 Ops/sec
Reduce with filled array	5860.2 Ops/sec
Reduce with filled array with null	6316.3 Ops/sec
Reduce with new Array	5628.4 Ops/sec
Reduce with var	21483.9 Ops/sec
Reduce with var []	14137.6 Ops/sec
Reduce with var [] assign by index	3608.6 Ops/sec

Related benchmarks:

Reduce array4 (version: 1)