Run results for: Uint(8/16/32)Array and BigInt64Array comparison performance

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36/9uiP7EnX-09

Browser: Chrome 112

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Uint16Array increment

3.3M/s

Uint8Array increment

3.3M/s

BigUint64Array increment

2.3M/s

Uint32Array increment

2.1M/s

View exact numbers

Test name	Executions per second
✓ Uint16Array increment	3,345,589 Ops/sec
Uint8Array increment	3,322,566 Ops/sec
BigUint64Array increment	2,255,058 Ops/sec
Uint32Array increment	2,084,863 Ops/sec

Script Preparation code:

var size = 8 * 40;
var srcBuf8 = new ArrayBuffer(size);
var srcBufPtr8 = new Uint8Array(srcBuf8);
var srcBuf16 = new ArrayBuffer(size*2);
var srcBufPtr16 = new Uint16Array(srcBuf16);
var srcBuf32 = new ArrayBuffer(size*4);
var srcBufPtr32 = new Uint32Array(srcBuf32);
var srcBuf64 = new ArrayBuffer(size*8);
var srcBufPtr64 = new BigUint64Array(srcBuf64);

for (let i = 0; i < size; i++) {
    srcBufPtr8[i] = 100 * Math.random();
}
for (let i = 0; i < size; i++) {
    srcBufPtr16[i] = srcBufPtr8[i];
}
for (let i = 0; i < size; i++) {
    srcBufPtr32[i] = srcBufPtr8[i];
}
for (let i = 0; i < size; i++) {
    srcBufPtr64[i] = BigInt(srcBufPtr8[i]);
}

Tests:

Uint8Array increment
let smallerCount = 0; for (let i = 0; i < (size-1); i++) { if (srcBufPtr8[i] < srcBufPtr8[i+1]) { smallerCount++; } }
Uint16Array increment
let smallerCount = 0; for (let i = 0; i < (size-1); i++) { if (srcBufPtr16[i] < srcBufPtr16[i+1]) { smallerCount++; } }
Uint32Array increment
let smallerCount = 0; for (let i = 0; i < (size-1); i++) { if (srcBufPtr32[i] < srcBufPtr32[i+1]) { smallerCount++; } }
BigUint64Array increment
let smallerCount = 0; for (let i = 0; i < (size-1); i++) { if (srcBufPtr64[i] < srcBufPtr64[i+1]) { smallerCount++; } }