Speedup your javaScript code using this for loops , analysis using "benchmarkjs" tool.

#javascript #es6

Hello, programmers and enthusiastic learner, hope you all having great day. So in last post I had analyze execution time of various loops in javaScript using console object. Today I am going to analyze it using benchmarkjs tool , thanks for Conner Peet for his valuable suggestion.
So let's start...


const cars = ["Tesla", "Tata", "Ford", "Land Rover", "Audi"];

let myCars;

//For-let loop
bench("for-let i++", () => {
  for (let i = 0; i < cars.length; i++) {
    myCars = cars[i];
  }
});

//For-let (i--) loop
bench("for-let i--", () => {
  for (let i = cars.length - 1; i >= 0; i--) {
    myCars = cars[i];
  }
});

//forEach Loop
bench("forEach", () => {
  cars.forEach((car) => {
    myCars = car;
  });
});

//For of loop
bench("for of", () => {
  for (const car of cars) {
    myCars = car;
  }
});

//For in loop
bench("for in", () => {
  for (const car in cars) {
    myCars = car;
  }
});

//map
bench("map", () =>
  cars.map((car) => {
    myCars = car;
  })
);

//Output

D:\JavaScript\Loops> matcha loops.js

         12,200,000 ops/sec > for-let i++ (24.4x)
         10,300,000 ops/sec > for-let i-- (20.6x)
         11,200,000 ops/sec > forEach (22.4x)
          7,080,000 ops/sec > for of (14.1x)
            502,000 ops/sec > for in (1x)
          5,760,000 ops/sec > map (11.5x)

  Benches: 6
  Fastest: for-let i++
  Elapsed: 35.5s