Benchmark: DataView or BitTwiddling, Aligned and Unaligned

Script Preparation code:

let buf = new ArrayBuffer(12);
u32s = new Uint32Array(buf);
u8s = new Uint8Array(buf);
dv = new DataView(buf);
offsetAligned = 0;
offsetUnaligned = 1;
value = 0x01020304;

Tests:

Bit Twiddling, Aligned
u8s[offsetAligned + 0] = value >> 24; u8s[offsetAligned + 1] = value >> 16; u8s[offsetAligned + 2] = value >> 8; u8s[offsetAligned + 3] = value;
DataView, Aligned
dv.setInt32(offsetAligned, value, false)
BitTwiddling, Unaligned
u8s[offsetUnaligned + 0] = value >> 24; u8s[offsetUnaligned + 1] = value >> 16; u8s[offsetUnaligned + 2] = value >> 8; u8s[offsetUnaligned + 3] = value;
DataView, Unaligned
dv.setInt32(offsetUnaligned, value, false)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Bit Twiddling, Aligned
DataView, Aligned
BitTwiddling, Unaligned
DataView, Unaligned

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Linux

View result in a separate tab

Test name	Executions per second
Bit Twiddling, Aligned	1213331.0 Ops/sec
DataView, Aligned	4665979.0 Ops/sec
BitTwiddling, Unaligned	1206346.0 Ops/sec
DataView, Unaligned	4622814.0 Ops/sec

DataView or BitTwiddling, Aligned and Unaligned (version: 2)

Is DataView faster than directly bit twiddling?

Comparing performance of: Bit Twiddling, Aligned vs DataView, Aligned vs BitTwiddling, Unaligned vs DataView, Unaligned

Created: 10 months ago by: Registered User

Jump to the latest result

Bit Twiddling, Aligned

DataView, Aligned

BitTwiddling, Unaligned

DataView, Unaligned

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A