window.bigMap = {}; window.bigArray = Array.from({length: 100}).map((_, index) => { const id = "person-id-" + index; const person = { id: id, name: `John Doe ${id}`, age: 18 + Math.floor(Math.random() * 70) }; bigMap[id] = person; return person }) window.generateId = function generateId() { return "person-id-" + Math.floor(Math.random() * 100); } window.getPersonFromMap = function getPersonFromMap() { const id = generateId(); return window.bigMap[id]; } window.getPersonFromArray = function getPersonFromArray() { const id = generateId(); return window.bigArray.find(function findById(p){ return p.id === id; }); } for (let i = 0; i < 10000; i++) { getPersonFromMap() } for (let i = 0; i < 10000; i++) { getPersonFromArray() }