Run results for: Uint(8/16/32)Array.set performance compare

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:122.0) Gecko/122.0 Firefox/122.0

Browser: Firefox Mobile 122

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Uint32Array.set

11.5M/s

Uint16Array.set

11.5M/s

Uint8Array.set

11.4M/s

BigUint64Array.set

11.4M/s

View exact numbers

Test name	Executions per second
✓ Uint32Array.set	11,517,969 Ops/sec
Uint16Array.set	11,500,357 Ops/sec
Uint8Array.set	11,447,069 Ops/sec
BigUint64Array.set	11,412,906 Ops/sec

Script Preparation code:

var size = 5000;
var srcBuf = new ArrayBuffer(size);
var srcBufPtr8 = new Uint8Array(srcBuf);
var srcBufPtr16 = new Uint16Array(srcBuf);
var srcBufPtr32 = new Uint32Array(srcBuf);
var srcBufPtr64 = new BigUint64Array(srcBuf);
var destBuf = new ArrayBuffer(size);
var destBufPtr8 = new Uint8Array(destBuf);
var destBufPtr16 = new Uint16Array(destBuf);
var destBufPtr32 = new Uint32Array(destBuf);
var destBufPtr64 = new BigUint64Array(destBuf);

for (let i = 0; i < size; i++) {
	srcBufPtr8[i] = 100*Math.random();
}

Tests:

Uint8Array.set
destBufPtr8.set(srcBufPtr8);
Uint16Array.set
destBufPtr16.set(srcBufPtr16);
Uint32Array.set
destBufPtr32.set(srcBufPtr32);
BigUint64Array.set
destBufPtr64.set(srcBufPtr64);