Should we really use anonymous functions as callback

performance-test.js

function measure (description, fn) {
  console.log('Running ' + description);
  let start = Date.now();
  fn(100000000);
  console.log(`Took ${Date.now() - start}ms\n`);
}

/**
 * The scenario is: We want to call a lot of callbacks.
 * Which is faster: The usual anonymous callback.
 * Creating and instantiating a class with a callback method.
 */

measure('anonymous callback', count => {
  let sum = 0;
  for (let i = 0; i < count; i++) {
    sum = (x => x + i)(sum);
  }
  console.log(sum);
});

measure('class', count => {
  class Adder {
    constructor(x) {
      this.x = x;
    }

    add(y) {
      return this.x + y;
    }
  }

  let sum = 0;
  for (let i = 0; i < count; i++) {
    sum = new Adder(i).add(sum);
  }
  console.log(sum);
});

measure('direct', count => {
  let sum = 0;
  for (let i = 0; i < count; i++) {
    sum += i;
  }
  console.log(sum);
});