Run results for: loading transformed {}[] values into Map: for of Map.set vs for of new Map ( results{}[] ) vs new Map ( {}[].map )

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser: Chrome 111

Operating system: Android

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for of Map set	174856.1 Ops/sec
for of new Map( results[] )	169911.9 Ops/sec
new Map( {}[].map )	156118.6 Ops/sec

Script Preparation code:

var test = /\s*(?<key>[^=\s=;][^=;]*?)(?:\s*=\s*(?<value>[^;]+?))?(?:;|$)/g
var sample = ' test1=1; test2; test 3; test 4= 4; test5 =5; test 6 = 6; test 7 = 777=77='

Tests:

for of Map set
const map = new Map for ( const { key, value } of sample.matchAll( test ) ) { map.set( key, value ) }
for of new Map( results[] )
const results = [] for ( const { key, value } of sample.matchAll( test ) ) { results.push( [ key, value ] ) } const map = new Map( results )
new Map( {}[].map )
const map = new Map ( [...sample.matchAll( test )] .map( ( { key, value } ) => [ key, value ] ) )

Run results for: loading transformed {}[] values into Map: for of Map.set vs for of new Map ( results{}[] ) vs new Map ( {}[].map )

for of Map set

for of new Map( results[] )

new Map( {}[].map )