Toggle navigation
MeasureThat
.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
Run results for:
Map vs Object (real-world) Performance (better)
Lookup of map vs object (in a real-world test format)
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=496757" 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/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Conspicuous Obj lookup 2
80/s
Conspicuous Map lookup 2
77/s
Conspicuous Obj lookup
53/s
Conspicuous Map lookup
44/s
View exact numbers
Test name
Executions per second
✓
Conspicuous Obj lookup 2
80 Ops/sec
Conspicuous Map lookup 2
77 Ops/sec
Conspicuous Obj lookup
53 Ops/sec
Conspicuous Map lookup
44 Ops/sec
Script Preparation code:
var keyCount = 16384 var keys = [] var map = new Map() var obj = Object.create(null) delete obj.x // Hide lookup keys to prevent V8 cheating (AKA Optimizing) var getConspicuousKey = seed => keys[Math.floor(seed * keyCount)] // Setup out test objects w/ random values for (let i=0; i<keyCount; i++) { let val = Math.random() let key = Math.random().toString() keys.push(key) map.set(key,val) obj[key] = val }
Tests:
Conspicuous Map lookup
for (let i=0; i<keyCount; i++) { let seed = Math.random() let key = getConspicuousKey(seed) a = map.get(key) }
Conspicuous Obj lookup
for (let i=0; i<keyCount; i++) { let seed = Math.random() let key = getConspicuousKey(seed) a = obj[key] }
Conspicuous Map lookup 2
for (let i=0; i<keyCount; i++) { let seed = Math.random() let key = getConspicuousKey(seed) a = map.get(key) }
Conspicuous Obj lookup 2
for (let i=0; i<keyCount; i++) { let seed = Math.random() let key = getConspicuousKey(seed) a = obj[key] }