Bit Counting

Benchmark created on

Setup

function countBits_string(n){
  return n.toString(2).split('1').length - 1;
}

function countBits_arithmetic(n){
  let bn = BigInt(n)
  let count = 0;
  while (bn) {
    bn &= (bn - 1n);
    count++;
  }
  return count;
}

const random_int = () => Math.floor(Math.random() * Number.MAX_SAFE_INTEGER);

Test runner

Ready to run.

Testing in
TestOps/sec
String Manipulation
countBits_string(random_int());
ready
Arithmetic
countBits_arithmetic(random_int());
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.