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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

BigUint64Array.set

3.1M/s

Uint8Array.set

3.1M/s

Uint32Array.set

3.1M/s

Uint16Array.set

3.0M/s

View exact numbers

Test name	Executions per second
✓ BigUint64Array.set	3,059,802 Ops/sec
Uint8Array.set	3,056,467 Ops/sec
Uint32Array.set	3,055,072 Ops/sec
Uint16Array.set	3,049,962 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);