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Lodash isEqual test ewww
(version: 0)
Test on isEqual performance
Comparing performance of:
flat isEqual vs manual check
Created:
6 years ago
by:
Guest
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HTML Preparation code:
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.15/lodash.min.js"></script>
Script Preparation code:
// flat window.test = {a: 1, b:2, c: 3, d: 4}; window.test2 = {a: 1, b:2, c: 3, d: 4};
Tests:
flat isEqual
_.isEqual(window.test, window.test1)
manual check
var a = (window.test.a === window.test2.a && window.test.b === window.test2.b && window.test.c === window.test2.c && window.test.d === window.test2.d)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
flat isEqual
manual check
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 benchmark and explain what's being tested. **What is being tested?** The provided JSON represents a JavaScript microbenchmark that tests the performance of two different approaches to compare two objects: `_.isEqual` (a function from the Lodash library) and manual comparison using the `&&` operator. **Options compared** Two options are compared: 1. **_.isEqual**: This is a function from the Lodash library that takes two objects as input and returns a boolean indicating whether they are equal. 2. **Manual check**: This approach uses the `&&` operator to compare each property of the two objects sequentially. If all properties match, it returns true; otherwise, it returns false. **Pros and Cons** * _.isEqual: + Pros: Efficient and concise way to compare objects, handles complex comparison scenarios out of the box. + Cons: Requires an external library (Lodash), may have overhead due to dependency loading. * Manual check: + Pros: No external dependencies, easy to implement and understand. + Cons: Can be slower and less efficient than _.isEqual, especially for large objects. **Other considerations** * **Memory allocation**: Both approaches allocate memory for temporary variables or function calls. However, _.isEqual is likely to optimize this process better due to its specialized implementation. * **Branch prediction**: The manual check approach may suffer from poor branch prediction, leading to slower performance on modern CPUs. **Library: Lodash** Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like array manipulation, string formatting, and object comparison. _.isEqual is one of its core functions, designed to efficiently compare objects and arrays. **Special JS feature or syntax (none)** There are no special JavaScript features or syntax used in this benchmark. **Other alternatives** If you wanted to implement a custom equality function without using Lodash, you could use the following approaches: * **Use a library like FastEqual**: This is another popular equality checking library for JavaScript. * **Implement your own equality function**: You can write a custom function that compares objects property by property, using techniques like deep copying and hash tables to optimize performance. Keep in mind that implementing an optimized equality function from scratch may require significant effort and expertise. Lodash's _.isEqual is a well-tested and optimized solution that has been extensively benchmarked and refined over the years.
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