test.js

const ifTask = () => {
  const color = "";
  if (color == "red") {
    //do something
  } else if (color == "blue") {
    //do something
  } else if (color == "brown") {
    //do something
  } else if (color == "black") {
    //do something
  } else {
    //do something
  }
};

const ifNoElseTask = () => {
  const color = "";
  if (color == "red") {
    //do something
    return;
  }
  if (color == "blue") {
    //do something
    return;
  }
  if (color == "brown") {
    //do something
    return;
  }
  if (color == "black") {
    //do something
    return;
  }
  //do something
  return;
};

const switchTask = () => {
  const color = "";
  switch (color) {
    case "red":
      //do something
      break;

    case "blue":
      //do something
      break;

    case "brown":
      //do something
      break;

    case "black":
      //do something
      break;

    default:
    //do something
  }
};

const lookupTask = () => {
  const color = "";
  const def = () => {
    /*do something*/
  };
  const dict = {
    red: () => {
      /*do something*/
    },
    blue: () => {
      /*do something*/
    },
    brown: () => {
      /*do something*/
    },
    black: () => {
      /*do something*/
    }
  };

  const task = dict[color] || def;

  def();
};

const runTest = (name, task, iterations) => {
  const start = new Date();
  for (var i = 0; i < iterations; i++) {
    task();
  }
  const end = new Date();

  const ticks = end.getTime() - start.getTime();

  console.log(`finished '${name}' - ${ticks}ms after ${iterations} iterations`);
};

const iterations = 100000000;

runTest("if", ifTask, iterations);
runTest("ifNoElse", ifNoElseTask, iterations);
runTest("switch", switchTask, iterations);
runTest("lookup", lookupTask, iterations);