Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
_.isEmpty vs !array || !array.length
(version: 0)
Comparing performance of:
_.isEmpty vs !array || !array.length
Created:
7 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>
Script Preparation code:
window.arr = []; for (var i = 0; i < 100; i++) { arr[i] = 'value' + i; }
Tests:
_.isEmpty
_.isEmpty(window.arr);
!array || !array.length
!window.arr || !window.arr.length
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
_.isEmpty
!array || !array.length
Fastest:
N/A
Slowest:
N/A
Latest run results:
No previous run results
This benchmark does not have any results yet. Be the first one
to run it!
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what's being tested. **Benchmark Overview** The benchmark is comparing two approaches to check if an array is empty: using Lodash's `isEmpty` function (`_.isEmpty(window.arr)`) and using a custom implementation (`!window.arr || !window.arr.length`). The benchmark prepares a JavaScript array of 100 elements with values ranging from `'value' + i`, where `i` is the index. **Library Used** The library used in this benchmark is Lodash, a popular utility library for JavaScript. Specifically, it's using the `isEmpty` function, which checks if an object or an array has any properties (not just numbers) and returns `true` if no properties are present. **Options Compared** There are two options being compared: 1. **Lodash's `isEmpty` function (`_.isEmpty(window.arr)`)**: This approach uses the Lodash library to perform the check. 2. **Custom implementation (`!window.arr || !window.arr.length`)**: This approach uses a simple conditional expression to check if the array is empty. **Pros and Cons** **Lodash's `isEmpty` function**: Pros: * Convenient to use, as it's part of the Lodash library * Handles various types of objects (not just arrays) that might have properties * Typically faster than a custom implementation Cons: * Requires including an additional library (Lodash) * Might be slower due to the overhead of loading and initializing the library **Custom implementation (`!window.arr || !window.arr.length`)**: Pros: * No additional libraries needed, as it's a simple expression * May be faster due to reduced overhead * Self-contained and easy to maintain Cons: * Requires manual handling of different types (arrays vs. other objects) * Might not handle edge cases or errors well **Other Considerations** The custom implementation assumes that the array only contains strings, which might not be the case in real-world scenarios. The Lodash `isEmpty` function is more robust and can handle various types. If you need to check for empty arrays frequently, using a simple expression like the custom implementation might be faster. However, if you're working with complex data structures or frequently use other Lodash functions, including the library might be worth it for convenience and consistency. **Special JS Feature/Syntax** There's no special JavaScript feature or syntax used in this benchmark that requires explanation. The focus is on the code and the performance comparison between two approaches.
Related benchmarks:
_.isEmpty vs Array.length
_.isEmpty vs. Array.length
_.isEmpty vs Array.length long array
isEmpty Test
Comments
Confirm delete:
Do you really want to delete benchmark?