Run results for: Random Integer Generator (favors numbers closer to 0)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:84.0) Gecko/20100101 Firefox/84.0

Browser: Firefox 84

Operating system: Mac OS X 10.16

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
function A (regular)	579096384.0 Ops/sec
function A (with Bitwise Double Not)	619639232.0 Ops/sec
function B (regular)	597727424.0 Ops/sec
function B (with Bitwise Double Not)	632134400.0 Ops/sec

Script Preparation code:

// https://gamedev.stackexchange.com/a/116837
function randIntA1(max, min = 0) {
  return Math.floor(Math.abs(Math.random() - Math.random()) * (1 + max - min) + min);
}
function randIntA2(max, min = 0) {
  return ~~(Math.abs(Math.random() - Math.random()) * (1 + max - min) + min);
}
function randIntB1(max, min = 0) {
  return Math.floor((1 + max - min) * (1 - Math.sqrt(1 - Math.random()))) + min;
}
function randIntB2(max, min = 0) {
  return ~~((1 + max - min) * (1 - Math.sqrt(1 - Math.random()))) + min;
}

Tests:

function A (regular)
randIntA1(10)
function A (with Bitwise Double Not)
randIntA2(10)
function B (regular)
randIntB1(10)
function B (with Bitwise Double Not)
randIntB2(10)

Run results for: Random Integer Generator (favors numbers closer to 0)

function A (regular)

function A (with Bitwise Double Not)

function B (regular)

function B (with Bitwise Double Not)