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lodash merge vs object.assign vs spread cam
(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
const a = { a: 'oh', b: 'my' }; const b = { c: 'goddess' }; const c = _.merge(a, b);
object.assign
const a = { a: 'oh', b: 'my' }; const b = { c: 'goddess' }; const c = Object.assign(a, b);
spread
const a = { a: 'oh', b: 'my' }; const b = { c: 'goddess' }; const c = { ...a, ...b };
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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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):
Let's dive into the world of JavaScript microbenchmarks! **What is being tested?** The provided JSON represents three individual test cases that compare the performance of different approaches to merge two objects: 1. `lodash.merge` 2. `object.assign` 3. `spread` (using the syntax `{ ...a, ...b }`) These test cases are designed to measure which approach is faster for merging objects. **Options compared** The three options being compared are: * **Lodash's `merge` function**: A popular utility library that provides a convenient way to merge objects. * **`Object.assign`**: A built-in JavaScript method that merges properties of two or more objects. * **Spread syntax (`{ ...a, ...b }`)**: A shorthand syntax introduced in ECMAScript 2018 that allows merging objects using the spread operator. **Pros and cons of each approach** 1. **Lodash's `merge` function**: * Pros: Convenient and widely used; provides more control over the merge process. * Cons: Adds dependency on Lodash library, which may increase bundle size. 2. **`Object.assign`**: * Pros: Fast and lightweight; built-in method makes it easy to use. * Cons: Limited control over the merge process; can lead to overwriting existing properties. 3. **Spread syntax (`{ ...a, ...b }`)**: * Pros: Simple and concise; allows for more flexible merging. * Cons: Requires ECMAScript 2018 support or newer; may not be as widely supported. **Libraries and special features** The `lodash.merge` function is a utility library provided by the Lodash project, which is widely used in JavaScript development. The `object.assign` method is a built-in JavaScript method that has been available since ECMAScript 5. There are no special JavaScript features or syntaxes being tested in this benchmark. **Other alternatives** If you're interested in exploring alternative approaches to merging objects, here are a few options: * **Using `Object.create()`**: This method creates a new object with the specified prototype and then merges properties from another object. * **Using a custom merge function**: You can create your own merge function using a simple loop or recursion to combine properties from two objects. Keep in mind that these alternatives may have varying performance characteristics and use cases, so it's essential to evaluate them based on your specific requirements.
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lodash merge vs object.assign vs spread overwriting one property
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lodash assign vs object.assign vs spread operator - variable and constant
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