Benchmark: (new)? DataView or BitTwiddling for Reads

Script Preparation code:

let buf = new ArrayBuffer(12);
u32s = new Uint32Array(buf);
u8s = new Uint8Array(buf);
dv = new DataView(buf);
offset = 0;
sum = 0;

Tests:

Bit Twiddling, Aligned
sum += ((u8s[offset] << 24) | (u8s[offset + 1] << 16) | (u8s[offset + 2] << 8) | u8s[offset + 3]) | 0;
DataView, Aligned
sum += dv.getInt32(offset, false);
new DataView, Aligned
sum += (new DataView(buf)).getInt32(offset, false);

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser/OS: Chrome 139 on Mac OS X 10.15.7

DataView, Aligned

13.3M/s

Bit Twiddling, Aligned

13.2M/s

new DataView, Aligned

9.8M/s

View exact numbers

(new)? DataView or BitTwiddling for Reads (version: 1)