Benchmark: JSON.stringify vs structuredClone vs cloneDeep

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var MyObject = {
 "resultCount":20,
 "results": [
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}


var myCopy = null;

Tests:

JSON.stringify
myCopy = JSON.parse(JSON.stringify(MyObject));
structuredClone
myCopy = structuredClone(MyObject);
cloneDeep
myCopy = _.cloneDeep(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.stringify
structuredClone
cloneDeep

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser/OS: Chrome 125 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
JSON.stringify	17579.9 Ops/sec
structuredClone	23021.1 Ops/sec
cloneDeep	19476.5 Ops/sec

Related benchmarks:

JSON.stringify vs structuredClone vs cloneDeep (version: 0)

JSON.stringify vs structuredClone

Comparing performance of: JSON.stringify vs structuredClone vs cloneDeep

Created: 7 months ago by: Guest

Jump to the latest result

JSON.stringify

structuredClone

cloneDeep

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):