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lodash merge vs object.assign vs spread with 3 objects
(version: 0)
Comparing performance of:
lodash merge vs object.assign vs spread
Created:
4 years ago
by:
Guest
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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 d = { g: 'was', h: 'yani'} var c = _.merge(a, b, c);
object.assign
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var d = { g: 'was', h: 'yani'} var c = Object.assign(a, b, c);
spread
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var d = { g: 'was', h: 'yani'} var c = { ...a, ...b, ...d };
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
lodash merge
object.assign
spread
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the benchmark for you. **Benchmark Overview** The provided benchmark compares three ways to merge two objects in JavaScript: 1. `lodash.merge` (using the Lodash library) 2. `object.assign` 3. Using the spread operator (`...`) **Test Cases** Each test case consists of a simple script that defines three variables: `a`, `b`, and `d`. The script then attempts to merge these variables using each of the three methods, and assigns the result back to `c`. * `lodash.merge`: Uses the Lodash library's `merge` function to combine the objects. * `object.assign`: Uses the `assign` method of the `Object` prototype to merge the objects. * Spread operator: Uses the spread operator (`...`) to create a new object with merged properties. **Options Compared** The benchmark compares three options for merging objects: 1. Using Lodash's `merge` function 2. Using the `object.assign` method 3. Using the spread operator **Pros and Cons of Each Approach** * **Lodash's `merge` function**: Pros: more readable code, fewer errors due to explicit function signature. Cons: adds an external dependency (Lodash), may be slower due to overhead. * **`object.assign` method**: Pros: built-in method, no dependencies required. Cons: less readable code, can lead to errors if not used correctly. * Spread operator: Pros: concise and expressive code, built-in method. Cons: may require additional property checks for compatibility. **Library: Lodash** Lodash is a popular JavaScript library that provides various utility functions, including `merge`. It is designed to provide a functional programming style, making it easier to write concise and readable code. **Special JS Feature/Syntax (None)** There are no special JavaScript features or syntax used in this benchmark. The focus is on comparing three common ways to merge objects. **Other Alternatives** If you're looking for alternatives to Lodash's `merge` function, you could consider: * Using the `Object.assign` method directly on an object, like `this.c = Object.assign({}, a, b)` * Using a library like Immutable.js or Ramda * Implementing your own merge function from scratch Keep in mind that each alternative has its pros and cons, and the choice of which one to use depends on your specific needs and preferences.
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