includes-benchmark-fixed.js

const Benchmark = require("benchmark");
const { ObjectId } = require("bson");
const _ = require("lodash");

const size = 100;
let array = new Array(size).fill(0).map(() => new ObjectId().toHexString());

const keyedDocs = _.keyBy(array);
const set = new Set(array);

const keysToGet = _.shuffle(array);

const suite = new Benchmark.Suite();

suite
  .add("object access", function () {
    let magic = true;
    for (const key of keysToGet) {
      magic = !!keyedDocs[key] || magic;
    }
  })
  .add("set", function () {
    let magic = true;
    for (const key of keysToGet) {
      magic = set.has(key) || magic;
    }
  })
  .add("array", function () {
    let magic = true;
    for (const key of keysToGet) {
      magic = array.includes(key) || magic;
    }
  })
  .on("cycle", (event) => {
    console.log(`\t ${size}`, String(event.target));
  })
  .on("complete", function () {
    console.log(
      `Fastest for ${size} is ` +
        this.filter("fastest").map("name")
    );
    console.log("\n\n");
  })
  .run({ async: false });