Run results for: set vs subarray-set vs pre-allocated subarray-set

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser: Chrome 112

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
set	1487.7 Ops/sec
subarray-set	1539.8 Ops/sec
pre-allocated subarray-set	1353.1 Ops/sec

Script Preparation code:

var start = 3e6;
var end = 4e6;

// for set
var array1 = Float32Array.from({length: 1e6}, Math.random);
var array2 = Float32Array.from({length: 1e6}, Math.random);

// for subarray-set
var array3 = Float32Array.from({length: 1e6}, Math.random);
var array4 = Float32Array.from({length: 10e6}, Math.random);

// for pre-allocated subarray-set
var array5 = Float32Array.from({length: 1e6}, Math.random);
var array6 = Float32Array.from({length: 10e6}, Math.random);
var subarray6 = array6.subarray(start, end);

Tests:

set
array1.set(array2, 0);
subarray-set
array3.set(array4.subarray(start, end), 0);
pre-allocated subarray-set
array5.set(subarray6, 0);