Run results for: .flatMap vs .map.flat

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/114.0.5735.124 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 114

Operating system: iOS 16.0

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Test flatMap	34.3 Ops/sec
Test map/flat	44.4 Ops/sec

Script Preparation code:

var arr = new Array(100000).fill(1);

Tests:

Test flatMap
arr.flatMap(() => [1, 2, [3, 4, true, "another", [{name:"first", age: 24, pref: {shows: ["rick and morty", "adventure time"]} }, {name:"second", age: 24, pref: {shows: ["the orville", "black mirror"]} }]]]);
Test map/flat
arr.map(() => [1, 2, [3, 4, true, "another", [{name:"first", age: 24, pref: {shows: ["rick and morty", "adventure time"]} }, {name:"second", age: 24, pref: {shows: ["the orville", "black mirror"]} }]]]).flat();

Run results for: .flatMap vs .map.flat

Test flatMap

Test map/flat