Benchmark: Compare spread operator in objects vs set the properties in the object directly

Script Preparation code:

var data = [
  {
    'key': 'Username',
    'value': 'Benutzername'
  },
  {
    'key': 'Password',
    'value': 'Passwort'
  },
  {
    'key': 'name',
    'value': 'Julious'
  },
  {
    'key': 'lastname',
    'value': 'Extremus'
  }
];

Tests:

Using the spread operator
const newData = data.reduce((acc, { key, value }) => ({ ...acc, [key]: value }), {});
Set the properties directly in the object
const newData = data.reduce((acc, row) => (acc[row.key] = row.value, acc), {});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Using the spread operator
Set the properties directly in the object

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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Browser/OS: Chrome 104 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Using the spread operator	2175008.0 Ops/sec
Set the properties directly in the object	10368490.0 Ops/sec

Compare spread operator in objects vs set the properties in the object directly (version: 0)

This benchmark is to compare the cost of using the spread operator in objects

Comparing performance of: Using the spread operator vs Set the properties directly in the object

Created: 4 years ago by: Registered User

Jump to the latest result

Using the spread operator

Set the properties directly in the object

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A