Run results for: includes vs indexOf (Array and String)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36

Browser: Chrome 81

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
string.indexOf	815114304.0 Ops/sec
string.includes	5158786.0 Ops/sec
array.indexOf	821003136.0 Ops/sec
array.includes	824180352.0 Ops/sec

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")

Run results for: includes vs indexOf (Array and String)

string.indexOf

string.includes

array.indexOf

array.includes