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lodash merge vs spread
(version: 0)
Comparing performance of:
lodash merge vs spread
Created:
7 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 c = _.merge({}, 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 (2)
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Test case name
Result
lodash merge
spread
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Overview of the Benchmark** The provided benchmark measures the performance of two approaches for merging objects: `_.merge()` from Lodash and the spread operator (`...`). **Options Compared** Two options are compared: 1. **Lodash `.merge()`**: This function merges two or more objects into a new object, returning the resulting object. 2. **Spread Operator (`...`)**: This operator allows for spreading the properties of an object onto another object. **Pros and Cons of Each Approach** **Lodash `.merge()`** Pros: * Well-established and widely-used library with good performance * Allows for flexible merging options (e.g., preserving array values, overwriting properties) * Easy to use and understand Cons: * Adds additional dependency on the Lodash library * May have slower performance compared to the spread operator due to the overhead of function calls **Spread Operator (`...`)** Pros: * Fast and efficient, with no additional dependencies or function calls * Simplifies code and is easy to read and write * Native JavaScript support makes it a good choice for most cases Cons: * Limited flexibility compared to Lodash `.merge()` (e.g., cannot preserve array values by default) * Requires modern browsers that support the spread operator **Other Considerations** When choosing between these two approaches, consider the specific requirements of your project. If you need more control over the merging process or are working with legacy browsers without support for the spread operator, Lodash `.merge()` might be a better choice. **Library: Lodash** Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like array manipulation, object merging, and more. In this benchmark, Lodash `.merge()` is used to compare its performance with the spread operator. Note that the spread operator is not part of Lodash but rather a native JavaScript feature introduced in ECMAScript 2015 (ES6). **Special JS Feature/Syntax** The spread operator (`...`) is a modern JavaScript feature that allows for spreading the properties of an object onto another object. This syntax was introduced in ES6 and is widely supported in modern browsers. In this benchmark, the spread operator is used as a simple and efficient way to merge two objects into a new object.
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