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Run results for:
Object literal vs JSON.parse
As long as the JSON string is only evaluated once, the JSON.parse approach is much faster compared to the JavaScript object literal, especially for cold loads.
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<iframe src="https://measurethat.net/Embed?id=622748" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.2 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 26
Operating system:
iOS 18.7
Device Platform:
Mobile
Date tested:
9 months ago
Benchmark engine:
Benchmark.js
Object literal test
435.9M/s
Json parse
16.8M/s
View exact numbers
Test name
Executions per second
✓
Object literal test
435,856,224 Ops/sec
Json parse
16,820,216 Ops/sec
Tests:
Object literal test
const literal = { foo: 42, bar: 1337 }; literal.foo;
Json parse
const json = JSON.parse('{"foo":42,"bar":1337}'); json.foo;