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Lodash.isEqual vs JSON.stringify Equality Comparison for Simple Object
(version: 0)
Test on isEqual performance
Comparing performance of:
_.isEqual vs JSON.stringify
Created:
3 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>
Script Preparation code:
window.foo = { cat: 'cat', dog: 'dog', bird: 'bird' }; window.bar = { cat: 'cat', dog: 'dog', bird: 'bird' };
Tests:
_.isEqual
_.isEqual(window.foo, window.bar)
JSON.stringify
JSON.stringify(window.foo) === JSON.stringify(window.bar);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
_.isEqual
JSON.stringify
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what is being tested, compared, and discussed. **Benchmark Overview** The test compares the performance of two equality comparison methods: Lodash's `isEqual` function and simple JSON string comparison using the `===` operator. **Test Case 1: Lodash.isEqual** * **Script Preparation Code**: This code defines two objects, `window.foo` and `window.bar`, which contain the same properties with the same values. * **Benchmark Definition**: `_.isEqual(window.foo, window.bar)`. This line of code calls the `isEqual` function from the Lodash library to compare the two objects. The test measures the execution time of this comparison. **Test Case 2: JSON.stringify Equality Comparison** * **Script Preparation Code**: Same as Test Case 1. * **Benchmark Definition**: `JSON.stringify(window.foo) === JSON.stringify(window.bar)`. This line of code uses the `JSON.stringify` function to serialize both objects and then compares their string representations using the `===` operator. The test measures the execution time of this comparison. **Comparison** The benchmark compares the performance of these two equality comparison methods: 1. **Lodash.isEqual**: A custom-built function that checks if two objects have the same properties with the same values. 2. **JSON.stringify Equality Comparison**: A simple comparison using `JSON.stringify` to serialize both objects and then compare their string representations. **Pros and Cons** * **Lodash.isEqual**: + Pros: Customizable, allows for more control over the comparison process. + Cons: May be slower due to its custom implementation. * **JSON.stringify Equality Comparison**: + Pros: Fast and simple, as it leverages JavaScript's built-in serialization mechanism. + Cons: May not work correctly with complex objects or nested structures. **Library** The Lodash library is used in Test Case 1. Lodash is a popular utility library that provides a wide range of functions for tasks such as array manipulation, object transformation, and more. In this case, the `isEqual` function is used to compare two objects. **Other Alternatives** If you wanted to implement your own equality comparison function, you could consider using: * **Object.keys()**: Iterate over the keys of both objects and check if they have the same values. * **Loops**: Compare each property individually using a loop. * **JSON.parse(JSON.stringify(obj))**: This method can be used to compare two JSON strings, but it's not recommended for comparing native JavaScript objects. Keep in mind that implementing your own equality comparison function can be complex and may lead to performance issues. Lodash's `isEqual` function is generally faster and more reliable for most use cases. **Special JS Feature** None of the test code uses any special JavaScript features or syntax, so no further explanation is necessary. I hope this explanation helps you understand what's being tested in MeasureThat.net!
Related benchmarks:
Lodash.isEqual vs JSON.stringify Equality Comparison for Shallow Array of Strings.
Lodash.isEqual vs JSON.stringify Equality Comparison for Plain Objects
Lodash.isEqual vs JSON.stringify Equality Comparison for Small Objects.
Lodash.isEqual vs JSON.stringify Equality Comparison for Shallow Array of Strings. Testing 123
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