Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
JavaScript spread operator vs create object performance vs destructuring
(version: 0)
Comparing performance of:
Using the spread operator vs Create new object vs destructuring
Created:
3 years ago
by:
Guest
Jump to the latest result
Tests:
Using the spread operator
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { ...firstObject, ...secondObject };
Create new object
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const finalObject = { sampleData: firstObject.sampleData, moreData: secondObject.moreData };
destructuring
const firstObject = { sampleData: 'Hello world' } const secondObject = { moreData: 'foo bar' } const {sampleData} = firstObject; const {moreData} = secondObject; const finalObject = { sampleData, moreData };
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
Using the spread operator
Create new object
destructuring
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** The provided benchmark, hosted on MeasureThat.net, compares the performance of three approaches for creating a new object in JavaScript: using the spread operator (`...`), manually creating a new object by assigning properties from two existing objects (`const finalObject = {...firstObject, ...secondObject}`), and destructuring assignment (`{...firstObject, ...secondObject}`). The benchmark aims to determine which approach is the most efficient. **Options Compared** The three options being compared are: 1. **Using the spread operator**: This method uses the `...` operator to create a new object by spreading the properties of one or more source objects. 2. **Manual object creation**: This method involves creating a new object and assigning its properties from two existing objects using the dot notation (`const finalObject = {...firstObject, ...secondObject}`). 3. **Destructuring assignment**: This method uses destructuring assignment to extract properties from two existing objects and assigns them to a new object (`{...firstObject, ...secondObject}`). **Pros and Cons of Each Approach** 1. **Using the spread operator**: * Pros: concise, expressive, and readable. * Cons: may lead to performance issues if used excessively or with large datasets. 2. **Manual object creation**: * Pros: control over the object structure, avoids potential performance issues with the spread operator. * Cons: more verbose and less readable than using the spread operator. 3. **Destructuring assignment**: * Pros: concise and expressive, allows for easy modification of individual properties. * Cons: may lead to performance issues if used excessively or with large datasets. **Library and Special JS Features** None of the benchmark test cases use a specific library. However, they do utilize JavaScript's destructuring assignment feature, which was introduced in ECMAScript 2015 (ES6). This feature allows for easy extraction of properties from objects. **Other Alternatives** In addition to the three options being compared, other approaches for creating a new object might include: * Using `Object.assign()` or `Object.create()` * Utilizing a library like Lodash or underscore.js * Implementing custom object creation logic However, these alternatives are not part of the provided benchmark. **Benchmark Preparation Code** The benchmark preparation code is empty, indicating that MeasureThat.net will handle script and HTML preparation.
Related benchmarks:
object assign vs object spread on growing objects
Array.prototype.slice vs spread operator with length limit
Array.prototype.slice vs spread operator on a bigger array
JavaScript spread operator vs Object.assign performance - Kien Nguyen
Object.assign() vs spread operator (New object)
Comments
Confirm delete:
Do you really want to delete benchmark?