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Run results for:
sorting
map & find with O(n^2) vs 2 iterations
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<iframe src="https://measurethat.net/Embed?id=507658" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36
Browser:
Chrome 121
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
lookup map using obj
16K/s
lookup map using map
16K/s
map & find
243/s
View exact numbers
Test name
Executions per second
✓
lookup map using obj
16,357 Ops/sec
lookup map using map
15,558 Ops/sec
map & find
243 Ops/sec
Script Preparation code:
ids = [...Array(1000)].map(() => window.crypto.randomUUID()); shuffledData = ids.sort(() => 0.5 - Math.random()).map(id => ({id, value: window.crypto.randomUUID()}));
Tests:
map & find
const sortedData = ids.map(id => shuffledData.find(item => item.id === id));
lookup map using obj
const map = {}; shuffledData.forEach(item => map[item.id] = item); const sortedData = ids.map(id => map[id]);
lookup map using map
const map = new Map(); shuffledData.forEach(item => map.set(item.id, item)); const sortedData = ids.map(id => map.get(id));