Run results for: bit flags: number vs bigint

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Windows

Device Platform: Desktop

Date tested: 7 months ago

Benchmark engine: Benchmark.js

Number

56K/s

Big Number

29K/s

View exact numbers

Test name	Executions per second
✓ Number	55,520 Ops/sec
Big Number	29,470 Ops/sec

Script Preparation code:

var big_value	= 0x00FF00FF00FF00FFn;
var big_mask	= 0x00FFFFFF00FFFFFFn;
var num_value	= 0x00FF00FF;
var num_mask	= 0x00FFFFFF;
var num2_value	= 0x00FF00FF;
var num2_mask	= 0x00FFFFFF;

Tests:

Number
let outer, outer2; let inverse = ~num_value; for(let i = 0; i < 10000; ++i) { // outer = ((num_value & num_mask) === num_mask) && (num2_value & num2_mask) === num2_mask; outer2 = ((num_value & num_mask) !== 0) && ((num2_value & num2_mask) !== 0); }
Big Number
let outer, outer2 for(let i = 0; i < 10000; ++i) { // outer = (big_value & big_mask) === big_mask; outer2 = (big_value & big_mask) !== 0n; }

Run results for: bit flags: number vs bigint

just comparing existence. probably could do more but just want to test single op

Number

Big Number