Investigate whether there is a difference in calculation speed between "Array" and "Set" for array intersections in javascript

intersection.js

const intersectionSet = (a, b) => {
  const setB = new Set(b);
  return Array.from(new Set([...new Set(a)].filter((x) => setB.has(x))));
};

const intersectionArr = (a, b) => a.filter((x) => b.includes(x));

const genTestArr = () =>
  [...Array(1000000)].map(() => Math.floor(Math.random() * 1000));
// [...Array(1000000)].map(() => `${Math.floor(Math.random() * 1000)}`);

const a = genTestArr();
const b = genTestArr();

console.log({ a, b });

console.time("set");
intersectionSet(a, b);
console.timeEnd("set");

console.time("arr");
intersectionArr(a, b);
console.timeEnd("arr");