Benchmark: Shallow copy vs structuredClone

Script Preparation code:

var MyObject = {
  string: 'string',
  number: 123456789,
  boolean: true,
  obj: {
    stringify: 'string',
    number: '123456789'
  }
};
var copied = undefined;

Tests:

Shallow copy
copied = { ...MyObject }
structuredClone
copied = structuredClone(MyObject)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Shallow copy
structuredClone

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.52

Browser/OS: Chrome 107 on Windows

View result in a separate tab

Test name	Executions per second
Shallow copy	2134765.0 Ops/sec
structuredClone	103462.9 Ops/sec

Shallow copy vs structuredClone (version: 0)

Comparing performance of: Shallow copy vs structuredClone

Created: one year ago by: Guest

Jump to the latest result

Shallow copy

structuredClone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A