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lodash VS assign VS spread merge
(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 = { b: 'goddess' }; var c = _.merge(a, b);
object.assign
var a = { a: 'oh', b: 'my' }; var b = { b: 'goddess' }; var c = Object.assign(a, b);
spread
var a = { a: 'oh', b: 'my' }; var b = { b: 'goddess' }; var c = { ...a, ...b };
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):
Let's dive into the benchmark. **Benchmark Overview** The benchmark compares three ways to merge two objects in JavaScript: using Lodash's `merge` function, `Object.assign()`, and the spread operator (`{ ... }`). The test cases create two objects, `a` and `b`, and then merge them into a third object, `c`. **Options Compared** * **Lodash's `merge` function**: This option uses Lodash's utility function to merge two objects. * **`Object.assign()`**: This option uses the built-in `Object.assign()` method to merge two objects. * **Spread operator (`{ ... }`)**: This option uses the spread operator to merge two objects. **Pros and Cons of Each Approach** 1. **Lodash's `merge` function**: * Pros: Lodash is a popular library with many useful utilities, including merging objects. The `merge` function can handle more complex merges than the other options. * Cons: Adding an external library can increase page load times and may not be necessary for simple use cases. 2. **`Object.assign()`**: * Pros: This is a built-in method in modern JavaScript, so no external libraries are needed. It's also relatively fast and efficient. * Cons: `Object.assign()` only merges the specified properties from one object into another, which may not be what you want if you have more complex merge scenarios. 3. **Spread operator (`{ ... }`)**: * Pros: The spread operator is a modern JavaScript feature that makes merging objects easy and concise. It's also relatively fast and efficient. * Cons: Like `Object.assign()`, it only merges the specified properties from one object into another. **Library Used** In this benchmark, Lodash's `merge` function is used as the third option for merging two objects. **Special JS Feature/Syntax** None of the test cases use any special JavaScript features or syntax beyond what's covered in modern JavaScript standards. **Other Alternatives** If you wanted to compare other merge methods, here are a few examples: * Using the `for...in` loop to iterate over properties and assign values. * Using a library like `lodash.mergeDeep` (which is similar to Lodash's `merge` function but with more advanced features). * Using a simple recursive function to merge objects. These alternatives would require additional test cases and may not be relevant to the specific requirements of this benchmark.
Related benchmarks:
lodash.assign vs object.assign vs spread
lodash merge vs object.assign vs spread (no intermediate vars)
lodash assign vs object.assign vs spread operator - variable and constant
lodash merge vs object.assign vs spread (v2)
lodash merge vs object.assign vs spread (v3)
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