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Lodash Array isEqual vs Native
(version: 0)
Comparing performance of:
_.isEqual vs Native
Created:
5 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>
Script Preparation code:
window.foo = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']; window.bar = ['a', 'c', 'b', 'd', 'e', 'f', 'g', 'h', 'j', 'i', 'k', 'l', 'm', 'n', 'p', 'o', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'];
Tests:
_.isEqual
_.isEqual(window.foo, window.bar)
Native
if (window.foo.length !== window.bar.length) return false; const uniqueValues = new Set([...window.foo, ...window.bar]); for (const v of uniqueValues) { const fooCount = window.foo.filter(e => e === v).length; const barCount = window.bar.filter(e => e === v).length; if (fooCount !== barCount) return false; } return true;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
_.isEqual
Native
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided JSON and explain what's being tested, compared, and some pros/cons of different approaches. **Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question compares the performance of Lodash's `isEqual` function with a native implementation. **Test Case 1: Lodash `isEqual`** The first test case uses the following code: ```javascript _.isEqual(window.foo, window.bar); ``` Here, we're calling the `isEqual` function from the Lodash library and passing two arrays, `window.foo` and `window.bar`, as arguments. **Library: Lodash** Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object creation, and string manipulation. In this case, the `isEqual` function is used to compare two arrays for equality. **Pros and Cons:** * Pros: + Concise and readable code + Provides a standardized way to compare arrays for equality + Can be useful in many scenarios where array comparison is required * Cons: + May have performance overhead due to the library's complexity + Requires including an external library, which may add latency **Test Case 2: Native Implementation** The second test case uses the following code: ```javascript if (window.foo.length !== window.bar.length) return false; const uniqueValues = new Set([...window.foo, ...window.bar]); for (const v of uniqueValues) { const fooCount = window.foo.filter(e => e === v).length; const barCount = window.bar.filter(e => e === v).length; if (fooCount !== barCount) return false; } return true; ``` This implementation is a native JavaScript solution that manually checks for array equality. **Pros and Cons:** * Pros: + No external library dependencies + Can be more optimized for performance, as it's native code + May provide better control over the comparison logic * Cons: + More verbose and complex code + Requires manual error handling and edge case consideration **Other Considerations** In addition to the above test cases, there may be other approaches to comparing arrays in JavaScript, such as using `JSON.stringify` or a custom implementation. However, these are not explicitly tested in the provided benchmark. **Alternatives** Some alternative approaches to comparing arrays include: * Using `Array.prototype.every()` and `Array.prototype.some()` * Utilizing `Set` data structures and iterating over them * Implementing a custom algorithm for array comparison However, it's worth noting that these alternatives may not be as widely supported or efficient as the Lodash `isEqual` function.
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