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lodash set vs merge vs spead
(version: 0)
Comparing performance of: lodash set vs lodash merge vs spread
Comparing performance of:
lodash set vs spread
Created:
6 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 set
var a = { a: 'oh', b: 'my' }; var b = { c: 'goddess' }; var output = _.set(a, 'c', 'goodness');
spread
var a = { a: 'oh', b: 'my' }; var c = 'goodness' ; var output = { ...a, c };
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
lodash set
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 explanation. **Benchmark Overview** The provided benchmark is designed to compare the performance of three different approaches: using `lodash.set()`, `lodash.merge()`, and using the spread operator (`{ ...a, c }`) to update an object in JavaScript. **Lodash Libraries** 1. **_set()**: The `_set()` function is used to set a value for a property on an object. It takes two arguments: the object to modify, and the key-value pair to add. 2. **_merge()**: The `_merge()` function is used to merge two objects into one. It takes two arguments: the first object and the second object to merge. **Spread Operator** The spread operator (`{ ...a, c }`) is a syntax feature introduced in ECMAScript 2015 (ES6). It allows you to create a new object by spreading the properties of an existing object into a new object. In this case, it's used to update the `a` object with a new property `c`. **Benchmark Test Cases** There are two test cases: 1. **Lodash Set**: This test case uses the `_set()` function to update the `b` object with a new property `c`. 2. **Spread**: This test case uses the spread operator to update the `a` object with a new property `c`. **Performance Comparison** The benchmark measures the performance of these three approaches by executing each test case multiple times ( indicated by "ExecutionsPerSecond" value) and comparing their execution times. **Pros and Cons** 1. **Lodash Set**: Pros: * Easy to use and read * Fast, as it directly updates the object property Cons: * Requires an additional library (`lodash.js`) to be included in the test environment 2. **Lodash Merge**: Pros: * Flexible, allowing for merging multiple objects Cons: * Slower than `_set()`, as it creates a new object and then merges it with the original 3. **Spread Operator**: Pros: * Native to JavaScript, no additional library required Cons: * Can be slower due to the overhead of creating a new object **Other Considerations** * When working with large objects or complex data structures, the spread operator might incur additional overhead. * Using libraries like Lodash can add extra weight to your test environment, potentially affecting performance. **Alternatives** If you're interested in alternative approaches, consider: 1. **Object.assign()**: A native JavaScript function for updating an object with new properties. 2. **JSON merge patches**: For more complex merging scenarios, consider using JSON merge patches (e.g., `nconf`) which can provide a more efficient and flexible solution. Keep in mind that the best approach depends on your specific use case, data structure complexity, and performance requirements.
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