JS loops benchmark.

loops.bench.js

import benny from "benny";

const data = Array.from({ length: 100_000 }, (_, i) => i);

let r1 = 0;
let r2 = 0;
let r3 = 0;
let r4 = 0;
let r5 = 0;

await benny.suite(
  "Loop through array of 100k numbers",

  benny.add("for", () => {
    for (let i = 0; i < data.length; i++) {
      r1 += data[i];
    }
  }),

  benny.add("for..of", () => {
    for (const item of data) {
      r2 += item;
    }
  }),

  benny.add("forEach", () => {
    data.forEach((item) => {
      r3 += item;
    });
  }),

  benny.add("reduce", () => {
    r4 += data.reduce((sum, item) => sum + item, 0);
  }),

  benny.add("while", () => {
    let i = 0;

    while (i < data.length) {
      r5 += data[i];
      i++;
    }
  }),

  benny.cycle(),
  benny.complete()
);

console.log({ r1, r2, r3, r4, r5 });