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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser: Firefox 138

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Uint8Array.set

23.8M/s

Uint32Array.set

23.6M/s

Uint16Array.set

23.5M/s

BigUint64Array.set

23.3M/s

View exact numbers

Test name	Executions per second
✓ Uint8Array.set	23,845,034 Ops/sec
Uint32Array.set	23,575,596 Ops/sec
Uint16Array.set	23,520,590 Ops/sec
BigUint64Array.set	23,284,310 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);