Benchmark: includes vs indexOf (Array and String)

Script Preparation code:

let array = ["Lorem", "ipsum", "dolor", "sit", "amet", "consectetur", "adipisicing", "elit.", "Perferendis", "rerum", "quos,", "laudantium", "modi", "magnam", "inventore", "ab", "deleniti", "vero", "eos", "aperiam", "facilis", "laboriosam", "sint!", "Sed", "eius", "facere", "tenetur", "nostrum.", "Doloribus,", "itaque."];

Tests:

string.indexOf
let string = "Lorem ipsum dolor sit amet consectetur adipisicing elit. Perferendis rerum quos, laudantium modi magnam inventore ab deleniti vero eos aperiam facilis laboriosam sint! Sed eius facere tenetur nostrum. Doloribus, itaque."; string.indexOf("magnam") string.indexOf("adipisicing") string.indexOf("not found")
string.includes
let string = "Lorem ipsum dolor sit amet consectetur adipisicing elit. Perferendis rerum quos, laudantium modi magnam inventore ab deleniti vero eos aperiam facilis laboriosam sint! Sed eius facere tenetur nostrum. Doloribus, itaque."; string.includes("magnam") string.includes("adipisicing") string.includes("not found")
array.indexOf
let array = ["Lorem", "ipsum", "dolor", "sit", "amet", "consectetur", "adipisicing", "elit.", "Perferendis", "rerum", "quos,", "laudantium", "modi", "magnam", "inventore", "ab", "deleniti", "vero", "eos", "aperiam", "facilis", "laboriosam", "sint!", "Sed", "eius", "facere", "tenetur", "nostrum.", "Doloribus,", "itaque."]; array.indexOf("magnam") array.indexOf("adipisicing") array.indexOf("not found")
array.includes
let array = ["Lorem", "ipsum", "dolor", "sit", "amet", "consectetur", "adipisicing", "elit.", "Perferendis", "rerum", "quos,", "laudantium", "modi", "magnam", "inventore", "ab", "deleniti", "vero", "eos", "aperiam", "facilis", "laboriosam", "sint!", "Sed", "eius", "facere", "tenetur", "nostrum.", "Doloribus,", "itaque."]; array.includes("magnam") array.includes("adipisicing") array.includes("not found")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
string.indexOf
string.includes
array.indexOf
array.includes

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.60 Safari/537.36

Browser/OS: Chrome 100 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
string.indexOf	587984000.0 Ops/sec
string.includes	2901698.0 Ops/sec
array.indexOf	596827100.0 Ops/sec
array.includes	577571300.0 Ops/sec

includes vs indexOf (Array and String) (version: 2)

Comparing performance of: string.indexOf vs string.includes vs array.indexOf vs array.includes

Created: 3 years ago by: Registered User

Jump to the latest result

string.indexOf

string.includes

array.indexOf

array.includes

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A