Run results for: fill array with value: map(callback) vs fill(value)

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.0

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
.map(callback) - 1 000 elements	495706.2 Ops/sec
.fill(value) - 1 000 elements	591959.2 Ops/sec
.map(callback) - 10 000 elements	73498.8 Ops/sec
.fill(value) - 10 000 elements	84284.5 Ops/sec
.map(callback) - 100 000 elements	6959.0 Ops/sec
.fill(value) - 100 000 elements	8237.8 Ops/sec

Script Preparation code:

var array1000 = (new Array(1000)).map((e, i) => ({a: i, b: i, c: i, d: i, e: i, f: i, g: i, test: 'object'+ i}));
var array10000 = (new Array(10000)).map((e, i) => ({a: i, b: i, c: i, d: i, e: i, f: i, g: i, test: 'object'+ i}));
var array100000 = (new Array(100000)).map((e, i) => ({a: i, b: i, c: i, d: i, e: i, f: i, g: i, test: 'object'+ i}));

Tests:

.map(callback) - 1 000 elements
const result = array1000.map(() => true);
.fill(value) - 1 000 elements
const result = new Array(array1000.length).fill(true);
.map(callback) - 10 000 elements
const result = array10000.map(() => true);
.fill(value) - 10 000 elements
const result = new Array(array10000.length).fill(true);
.map(callback) - 100 000 elements
const result = array100000.map(() => true);
.fill(value) - 100 000 elements
const result = new Array(array100000.length).fill(true);

Run results for: fill array with value: map(callback) vs fill(value)

.map(callback) - 1 000 elements

.fill(value) - 1 000 elements

.map(callback) - 10 000 elements

.fill(value) - 10 000 elements

.map(callback) - 100 000 elements

.fill(value) - 100 000 elements