Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
lodash assign again vs object.assign vs spread
(version: 0)
Comparing performance of:
lodash merge vs object.assign vs spread
Created:
7 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Tests:
lodash merge
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = _.assign(a, b);
object.assign
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = Object.assign(a, b);
spread
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var c = { ...a, ...b };
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
lodash merge
object.assign
spread
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 MeasureThat.net benchmark compares the performance of three approaches for merging two objects: `_.assign` from the Lodash library, `Object.assign`, and the spread operator (`{ ...a, ...b }`). **Options Compared** 1. **Lodash _.assign**: This method merges two or more objects into a new object, allowing you to specify an optional options object. 2. **Object.assign**: This method copies all enumerable own properties from one or more source objects to a destination object. 3. **Spread Operator (`{ ...a, ...b }`)**: This syntax creates a new object by copying all enumerable properties from two or more sources (in this case, `a` and `b`). **Pros and Cons of Each Approach** 1. **Lodash _.assign**: * Pros: Provides a flexible way to merge objects, allowing you to specify options for handling certain properties. * Cons: Requires the Lodash library, which may introduce additional overhead. 2. **Object.assign**: * Pros: Simple and straightforward, with no additional libraries required. * Cons: Does not provide as much control over the merging process as _.assign does. 3. **Spread Operator (`{ ...a, ...b }`)**: * Pros: Concise and easy to read, with no additional libraries required. * Cons: Only works in modern browsers that support the spread operator. **Library Descriptions** 1. **Lodash**: A popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object merging, and more. **JavaScript Feature/ Syntax Explanation** The benchmark uses the spread operator (`{ ...a, ...b }`) in the third test case. This syntax was introduced in ECMAScript 2018 (ES8) and allows you to create a new object by copying all enumerable properties from two or more sources. **Other Alternatives** 1. **Object.merge()**: Some older versions of Node.js provided an `Object.merge()` method, which is similar to `_.assign` but with some differences in syntax and behavior. 2. **Merge functions from other libraries**: Other JavaScript libraries, such as Underscore.js or Ramda, may provide their own merge functions that can be used instead of _.assign. In summary, the MeasureThat.net benchmark provides a useful comparison of three approaches for merging objects: Lodash _.assign, Object.assign, and the spread operator. Understanding the pros and cons of each approach can help developers choose the best method for their specific use case.
Related benchmarks:
lodash.assign vs object.assign vs spread
lodash assign vs spread
lodash assign vs object.assign vs spread operator - variable and constant
Object.assign vs Lodash.assign (4.17.21)
Lodash.assign vs Object.assign vs spread assign
Comments
Confirm delete:
Do you really want to delete benchmark?