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fast_deep_equal - lodash.isEqual 2
(version: 0)
Comparing performance of:
lodash vs fast-deep-equal vs JSON
Created:
4 years ago
by:
Guest
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HTML Preparation code:
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/fast-deep-equal@3.1.3/index.min.js"></script>
Script Preparation code:
// 1 level deep window.foo1 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }; window.bar1 = { a: 1, b: 3, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }; // 2 levels deep window.foo2 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }; window.bar2 = { a: 1, b: 2, c: { a: 1, b: 3, c: { a: 1, b: 2 } } }; // 3 levels deep window.foo3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } }; window.bar3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 4 } } };
Tests:
lodash
_.isEqual(window.foo1, window.bar1)
fast-deep-equal
equal(window.foo1, window.bar1);
JSON
JSON.stringify(window.foo1) === JSON.stringify(window.bar1);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
lodash
fast-deep-equal
JSON
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! **Benchmark Overview** The provided JSON represents a benchmarking test for three different approaches: Lodash's `isEqual` function, Fast-Deep-Equal's `equal` function, and the built-in `JSON` equality check. The test creates two sets of objects at varying levels of depth (1, 2, and 3) and compares them using each approach. **Options Compared** 1. **Lodash's `isEqual` function**: This function checks for deep object equality by recursively traversing the objects' properties. 2. **Fast-Deep-Equal's `equal` function**: This function is a specialized implementation of deep object equality, optimized for performance. 3. **Built-in `JSON` equality check**: This method uses JSON stringification to compare two values and checks if they are equal. **Pros and Cons** 1. **Lodash's `isEqual` function**: * Pros: Highly flexible and tolerant, works well with complex data structures. * Cons: Can be slow for very deep or large objects. 2. **Fast-Deep-Equal's `equal` function**: * Pros: Optimized for performance, highly optimized for common cases. * Cons: May not work as expected with complex or non-standard data structures. 3. **Built-in `JSON` equality check**: * Pros: Fast and simple to implement, works well for most use cases. * Cons: Can be brittle when dealing with custom objects or complex data structures. **Library and Purpose** * **Lodash**: A utility library that provides a wide range of functions for working with arrays, objects, and more. In this benchmark, Lodash's `isEqual` function is used to compare two objects. * **Fast-Deep-Equal**: A specialized implementation of deep object equality, designed to be fast and efficient. **Special JS Feature or Syntax** None mentioned in the provided code, but it's worth noting that JavaScript has several features and syntaxes that can affect performance, such as: * `let` and `const` declarations (vs. traditional `var`) * Arrow functions (`() => {}`) vs. traditional function expressions * Async/await syntax However, these are not relevant to the specific benchmark being discussed. **Other Alternatives** If you need a custom implementation or alternative approach for deep object equality, consider using: * **Recursion**: Implementing a recursive function that checks each property of both objects. * **Iterative methods**: Using iterative approaches like `for` loops or libraries like `lodash's` `each` method to compare properties. Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to the specialized implementations provided by Fast-Deep-Equal and Lodash.
Related benchmarks:
Lodash (v4.17.15) isEqual test
Equality test
Lodash isEqual Array of Objects test
lodash _isEqual
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