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Run results for:
Map vs Object.create(null)
Lookup of map vs object
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Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:150.0) Gecko/20100101 Firefox/150.0
Browser:
Firefox 150
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one month ago
Test name
Executions per second
Map lookup
76188.9 Ops/sec
Obj lookup
95381.0 Ops/sec
Script Preparation code:
var map = new Map(); var obj = Object.create(null); for (let i = 0; i < 20; ++i) { map.set(i, i) obj[i] = i } var i = 0, count = 1000, a;
Tests:
Map lookup
for (i = 0; i < count; i++) { a = map.get(i % 20); }
Obj lookup
for (i = 0; i < count; i++) { a = obj[i % 20]; }