1.js

/*
Name: Array methods
HZ: 4642.041341511592
Count: 240


Name: Transducer
HZ: 161841.1974395176
Count: 8669


Name: For
HZ: 786935.9631453991
Count: 40472
*/

const { Suite } = require("benchmark");
const Random = require("random-js");
const { compose, transduce, into, take, filter, pluck } = require("ramda");

const suite = new Suite();
const random = new Random();

function present({ name, hz, count }) {
  console.log(
    `
    Name: ${name}
    HZ: ${hz}
    Count: ${count}
  `
  );
}

function makeScore(gameID) {
  const my = random.integer(0, 5);
  const others = random.integer(0, 5);

  return { gameID, my, others };
}

function makeScores(length) {
  return Array.from({ length }, (_, gameID) => makeScore(gameID));
}

const scores = makeScores(1000);

function append(xs, x) {
  xs.push(x);
  return xs;
}

const transformation = compose(
  filter(({ my, others }) => my > others),
  pluck("gameID"),
  take(2)
);

suite
  .add("Array methods", () => {
    scores
      .filter(({ my, others }) => my > others)
      .map(({ gameID }) => gameID)
      .slice(0, 2);
  })
  .add("Transducer", () => {
    transduce(transformation, append, [], scores);
  })
  .add("For", () => {
    const result = [];
    for (const { my, others, gameID } of scores)
      if (my > others) {
        result.push(gameID);
        if (result.length >= 2) break;
      }
  })
  .on("complete", ({ currentTarget }) => {
    currentTarget.forEach(present);
  })
  .run();