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Run results for:
Map vs Object - string keys - write performance
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0
Browser:
Firefox 146
Operating system:
Windows
Device Platform:
Desktop
Date tested:
4 months ago
Test name
Executions per second
Write to map
188731.9 Ops/sec
Write to obj
188330.1 Ops/sec
Script Preparation code:
window.myObj = {}; window.myMap = new Map(); window.generateId = () => new Date().toISOString() + '=' + Math.random(); window.generateObj = () => ({ 'a': generateId(), 'b': generateId(), 'c': generateId() });
Tests:
Write to map
myMap.set(generateId(), generateObj());
Write to obj
myObj[generateId()] = generateObj();