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lodash isEmpty vs isEqual
(version: 0)
Comparing performance of:
isEmpty vs isEqual
Created:
6 years ago
by:
Registered User
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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:
var obj = {};
Tests:
isEmpty
_.isEmpty(obj)
isEqual
_.isEqual(obj, {})
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
isEmpty
isEqual
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 its test cases. **What is tested?** The website MeasureThat.net tests two specific functions from the Lodash library: `_.isEmpty` and `_.isEqual`. These functions are used to check if an object is empty or if two objects are equal, respectively. **Options compared** Two options are being compared: 1. **_.isEmpty(obj)**: This function checks if an object has any properties. 2. **_.isEqual(obj, {})**: This function checks if two objects have the same properties and values. **Pros and Cons of different approaches** **_.isEmpty(obj)** * Pros: + Fast and efficient, as it only needs to check for the existence of any properties. + Can be useful in situations where you want to know if an object is empty or not. * Cons: + May return false positives if the object has a very large number of properties (due to JavaScript's property lookup mechanism). + Does not account for objects that have properties with default values. **_.isEqual(obj, {})** * Pros: + More accurate than _.isEmpty, as it checks both the existence and value of properties. + Can be useful in situations where you want to know if two objects are identical. * Cons: + Slower and more memory-intensive than _.isEmpty, as it needs to compare each property. **Other considerations** Both functions assume that the object being passed to them is a plain JavaScript object (i.e., not an array or other data structure). If you need to use these functions with other data structures, you may need to modify them accordingly. **Library: Lodash** Lodash is a popular JavaScript utility library that provides a collection of functional programming helpers. The `_.isEmpty` and `_.isEqual` functions are part of the Lodash library's array and object manipulation modules. **Special JS feature/Syntax** There is no special JavaScript feature or syntax being used in this benchmark. However, it's worth noting that MeasureThat.net uses a custom benchmarking framework that allows for easy comparison of different benchmarks across various platforms and browsers. **Other alternatives** If you don't want to use Lodash or if you prefer not to rely on third-party libraries, you can implement these functions yourself using JavaScript: * `_.isEmpty(obj)`: ```javascript function isEmpty(obj) { return Object.keys(obj).length === 0; } ``` * `_.isEqual(obj, {})`: ```javascript function isEqual(obj, other) { if (typeof obj !== 'object' || typeof other !== 'object') return false; const keys = Object.keys(obj); for (const key of keys) { if (!Object.prototype.hasOwnProperty.call(other, key) || obj[key] !== other[key]) return false; } return true; } ``` Keep in mind that these implementations may not be as efficient or robust as the Lodash versions.
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