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Run results for:
Map vs Object with 100 keys and 1/2 delete
Lookup of map vs object
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0
Browser:
Firefox 143
Operating system:
Windows
Device Platform:
Desktop
Date tested:
7 months ago
Test name
Executions per second
Map set
11010.3 Ops/sec
Obj set
18857.8 Ops/sec
Script Preparation code:
var map = new Map(); var obj = {}; const nbKeys = 100; for(let n =0; n<nbKeys; n++) { const nKey = n; const nValue = Math.random(); map.set(nKey, nValue ); obj[nKey] = nValue ; } var i = 0, count = 1000, a; function getRandomInt(max) { return Math.floor(Math.random() * max); } const deleteFreq = 2;
Tests:
Map set
for (i = 0; i < count; i++) { const deleteOrSet = getRandomInt(deleteFreq) !== 0 if(deleteOrSet) map.delete(getRandomInt(nbKeys)); else map.set(getRandomInt(nbKeys), getRandomInt(42)); }
Obj set
for (i = 0; i < count; i++) { const deleteOrSet = getRandomInt(deleteFreq) !== 0 if(deleteOrSet) delete obj[getRandomInt(nbKeys)]; else obj[getRandomInt(nbKeys)] = getRandomInt(42); }