Run results for: Create a Dictionary with Object.fromEntries vs Map

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:105.0) Gecko/20100101 Firefox/105.0

Browser: Firefox 105

Operating system: Ubuntu

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.fromEntries	1364.7 Ops/sec
Map	717.2 Ops/sec

Script Preparation code:

var ids = Array.from(Array(10000).keys())

var data = ids.map(item => ({ id: item, random: Math.random() }))

Tests:

Object.fromEntries
// Create the dictionary const dictionary = Object.fromEntries( data.map((item) => [ // Key item.id, // Item item, ]) ); // Utilize it, to test the performance of the dictionary itself as well. ids.map((id) => dictionary[id]);
Map
// Create the dictionary const dictionary = new Map( data.map((item) => [ // Key item.id, // Item item, ]) ); // Utilize it, to test the performance of the dictionary itself as well. ids.map((id) => dictionary.get(id));