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Run results for:
Map.get vs Object property access and more
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36
Browser:
Chrome 148
Operating system:
Windows
Device Platform:
Desktop
Date tested:
17 days ago
Test name
Executions per second
Map get exists
169077184.0 Ops/sec
Object get exists
85375512.0 Ops/sec
Map get does not exist
171098576.0 Ops/sec
Object get does not exist
53323656.0 Ops/sec
Map set
93388656.0 Ops/sec
Object set
98070696.0 Ops/sec
Script Preparation code:
obj = {foo: 'bar'}; map = new Map(Object.entries(obj)); for (let i = 0; i < 10000; i++) { const key = Math.random(); obj[key] = i; map.set(key, i); }
Tests:
Map get exists
const x = map.get("foo")
Object get exists
const x = obj["foo"]
Map get does not exist
const x = map.get("not here")
Object get does not exist
const x = obj["not here"]
Map set
map.set("new key", 1);
Object set
obj["new key"] = 1;