Compare Math.floor and ~~

compare.js

const getNumbers = () => {
  const numbers = [];
  
  for(let i = 0; i < 50000; i++) {
    const n = +(Math.random() * 10000).toFixed(5);
    numbers.push(n);
  }
  
  return numbers;
}

const numbers = getNumbers();

const test1 = () => {
  let x = 0;
  for(let i = 0; i < 1000; i++) {
    numbers.forEach(n => {
      x = Math.floor(n);
    });
  }
};

const test2 = () => {
  let x = 0;
  for(let i = 0; i < 1000; i++) {
    numbers.forEach(n => {
      x = ~~n;
    });
  }
};

let start, end;

start = Date.now();
test2();
end = Date.now();

console.log((end-start) / 1000);

start = Date.now();
test1();
end = Date.now();

console.log((end-start) / 1000);