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_.isEmpty vs 3 array.length 4
(version: 0)
Comparing performance of:
_.isEmpty vs Object.keys().length
Created:
3 years ago
by:
Guest
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HTML Preparation code:
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>
Script Preparation code:
window.obj = { a: [], b: [], c: [], };
Tests:
_.isEmpty
_.isEmpty(window.obj);
Object.keys().length
window.obj.a.length === 0 && window.obj.b.length === 0 && window.obj.c.length === 0;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
_.isEmpty
Object.keys().length
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the benchmark and explain what's being tested, compared, and considered. **Benchmark Overview** MeasureThat.net provides a JavaScript microbenchmarking platform where users can create and run benchmarks. The provided JSON represents a simple benchmark that tests two approaches to check if an array is empty: using Lodash's `isEmpty` function versus checking the length of three arrays. **Script Preparation Code** The script preparation code creates an object `window.obj` with three empty arrays: `a`, `b`, and `c`. This object will be used as the test subject for both benchmark tests. **Html Preparation Code** The HTML preparation code includes a reference to Lodash's minified JavaScript file (version 4.17.4) in the `<script>` tag. This library is used by the first benchmark test that calls `_.isEmpty(window.obj)`. **Benchmark Definition** There are two individual test cases: 1. **_.isEmpty**: This test case uses Lodash's `isEmpty` function to check if the `window.obj` object is empty. * **Pros:** + concise and readable code + leverages a well-tested library (Lodash) * **Cons:** + might incur overhead due to the need to load an external library 2. **Object.keys().length**: This test case uses the `Object.keys()` function in combination with array length checks to determine if any of the three arrays are empty. * **Pros:** + lightweight and fast (no external libraries required) + potentially more efficient than using Lodash's `isEmpty` function * **Cons:** + might be less readable or maintainable due to the use of multiple checks **Library Explanation** Lodash is a popular JavaScript utility library that provides various functions for tasks like string manipulation, array manipulation, and object management. In this benchmark, Lodash's `isEmpty` function is used to check if an object or array is empty. **Special JS Feature/Syntax** None are mentioned in the provided code. However, it's worth noting that some JavaScript features or syntax might be used in more complex benchmarks, such as: * Async functions and promises * Generators and iterators * Closures and scope management * ES6+ syntax (e.g., arrow functions, template literals) **Alternatives** Other alternatives for checking if an array is empty include: 1. Using `length === 0` directly on the array object. 2. Creating a function that checks if an array has any elements using `some()` or `every()`. 3. Using a custom implementation with a simple loop to check each element of the array. However, in this specific benchmark, the two approaches being compared are already quite simple and efficient, so alternative implementations might not significantly impact the results.
Related benchmarks:
_.isEmpty vs Array.length
_.isEmpty vs. Array.length
_.isEmpty vs 3 array.length 2
_.isEmpty vs 3 array.length 3
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