Array .includes vs object lookup (300 items) (v5)

Revision 5 of this benchmark created on

Description

Array .includes vs object lookup. 300 items and value of 20 characters length.

Setup

var AMOUNT_OF_VALUES = 300;
var STRING_VALUE_LENGTH = 20;

function generateRandomString() {
  return 'x'.repeat(STRING_VALUE_LENGTH).replace(/[x]/g, function (c) {
    var r = Math.random() * 16 | 0;
    var v = c === 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
}

var valuesArray = [...Array(AMOUNT_OF_VALUES)].map(_ => generateRandomString());

var valuesObject = valuesArray.reduce((acc, e) => ({ ...acc, [e]: true }), {});

var getRandomValue = () => valuesArray[Math.floor(Math.random() * valuesArray.length)];

Test runner

Ready to run.

Testing in
TestOps/sec
.includes
var randomValue = getRandomValue();
var result = valuesArray.includes(randomValue);
ready
object lookup
var randomValue = getRandomValue();
var result = !!valuesObject[randomValue];
ready

Revisions

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