Run results for: String Array: Includes vs regex test vs indexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser: Chrome 119

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Array.prototype.includes()

5.4M/s

Array.prototype.indexOf()

5.4M/s

RegExp.prototype.test()

308K/s

View exact numbers

Test name	Executions per second
✓ Array.prototype.includes()	5,442,840 Ops/sec
Array.prototype.indexOf()	5,417,848 Ops/sec
RegExp.prototype.test()	307,581 Ops/sec

Script Preparation code:

var targetString = 'could'

var stringArray = [
    "Hopes",
    "and",
    "dreams",
    "were",
    "dashed",
    "that",
    "day.",
    "It",
    "should",
    "have",
    "been",
    "expected,",
    "but",
    "it",
    "still",
    "came",
    "as",
    "a",
    "shock.",
    "The",
    "warning",
    "signs",
    "had",
    "been",
    "ignored",
    "in",
    "favor",
    "of",
    "the",
    "possibility,",
    "however",
    "remote,",
    "that",
    "it",
    "could",
    "actually",
    "happen.",
    "That",
    "possibility",
    "had",
    "grown",
    "from",
    "hope",
    "to",
    "an",
    "undeniable",
    "belief",
    "it",
    "must",
    "be",
    "destiny.",
    "That",
    "was",
    "until",
    "it",
    "wasn't",
    "and",
    "the",
    "hopes",
    "and",
    "dreams",
    "came",
    "crashing",
    "down."
]

Tests:

Array.prototype.includes()
stringArray.includes(targetString)
RegExp.prototype.test()
new RegExp(stringArray.join('|')).test(targetString)
Array.prototype.indexOf()
stringArray.indexOf(targetString)