2048-addNumberBenchmark.js

2048-addNumberBenchmark.js

// npm i --save benchmark
const Benchmark = require('benchmark');
var suite = new Benchmark.Suite;

const addNumberFunc = (board, point, number=2)=>{
  const line = board[point[0]];
  return [
    ...board.slice(0, point[0]),
    [
      ...line.slice(0, point[1]),
      number,
      ...line.slice(point[1]+1, line.length)
    ],
    ...board.slice(point[0]+1, board.length)
  ];
}

const addNumber = (board, point, number=2) => {
  return board.map(
    (line, columnIdx) => line.map((block, lineIdx) =>
        columnIdx === point[0] && lineIdx === point[1] ? number : block
    ));
};

const board = [[2, 2, 2, 2], [0, 4, 16, 16], [8, 8, 0, 32], [0, 0, 0, 64]];

// add tests
suite
  .add('Using slice', function() {
    addNumberFunc(board, [1, 1]);
  })
  .add('Using map', function() {
    addNumber(board, [1, 1]);
  })
  .on('complete', function() {
    this.forEach((bench) => {
      console.log(`Test ${bench.name}`);
      console.log(`Runned ${bench.count} times`);
      console.log('============');
    });

    console.log('Fastest is ' + this.filter('fastest').map('name'));
  })
// run async
  .run({ 'async': true, maxTime: 20 });