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Run results for:
Persisting Set object vs recreating Set objects while maintaining a deduplicated ordered array
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<iframe src="https://measurethat.net/Embed?id=600398" 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/133.0.0.0 Safari/537.36
Browser:
Chrome 133
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Reusing Set objects Creating a new Set object every Iteration
18.3 Ops/sec
Reusing Set object
47.7 Ops/sec
Script Preparation code:
// create an array of the numbers 1-1000, with each entry doubled, so: // [1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, ... , 999, 999, 1000, 1000] const doubledNumbers = []; for (let i = 1; i <= 1000; i++) { doubledNumbers.push(i, i); } let dedupedAndSortedNumbers_1 = [] let dedupedAndSortedNumbers_2 = []
Tests:
Reusing Set objects Creating a new Set object every Iteration
for (const number of doubledNumbers) { const next = new Set(dedupedAndSortedNumbers_1); next.add(number); dedupedAndSortedNumbers_1 = Array.from(next).sort((a, b) => a - b); }
Reusing Set object
const set = new Set(dedupedAndSortedNumbers_2); for (const number of doubledNumbers) { set.add(number); dedupedAndSortedNumbers_2 = Array.from(set).sort((a, b) => a - b); }