Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
_.isEmpty vs. Array.length
(version: 0)
Comparing performance of:
_.isEmpty vs Array.length
Created:
6 years ago
by:
Registered User
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:
var arr = [];
Tests:
_.isEmpty
_.isEmpty(arr);
Array.length
arr.length === 0;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
_.isEmpty
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):
I'd be happy to explain the benchmark. **Overview** The provided JSON represents a JavaScript microbenchmark that tests two different approaches for checking if an array is empty: using the `_.isEmpty()` function from the Lodash library and the built-in `Array.length` property. **Options Compared** Two options are compared: 1. **Lodash's _.isEmpty()**: This function checks if an array is empty by calling the `length` property on it and then comparing it to 0 using the `===` operator. 2. **Built-in Array.length property**: This approach directly checks the length of the array, which returns 0 if the array is empty. **Pros and Cons** * **Lodash's _.isEmpty()**: + Pros: Often more readable and easier to understand than checking `Array.length`. It also handles edge cases like null or undefined arrays. + Cons: It adds an extra dependency on Lodash, which may not be necessary for simple use cases. Additionally, it has a slightly higher overhead due to the function call. * **Built-in Array.length property**: + Pros: Lightweight and doesn't add any dependencies. It's also generally faster since it only accesses the array's properties. + Cons: May not be as readable or intuitive for developers without knowledge of JavaScript's internal workings. **Library Usage** The Lodash library is used in this benchmark to provide the `_.isEmpty()` function. The library helps simplify the code and makes it more expressive, but it does add an extra dependency. **Special JS Feature/Syntax** There is no special JavaScript feature or syntax mentioned in this benchmark. It only uses standard JavaScript constructs like arrays and functions. **Other Alternatives** If you wanted to compare other approaches for checking if an array is empty, some alternatives could be: * Using the `for...of` loop with a counter variable. * Creating a custom function using bitwise operations (e.g., `arr.length === 0 && arr[0] === undefined`). * Using a library like Fastify or Bunyan to handle errors and edge cases. However, these alternatives might not be as efficient or readable as the approaches tested in this benchmark.
Related benchmarks:
_.isEmpty vs !array || !array.length
_.isEmpty vs Array.length
isEmpty vs. vanilla
isEmpty Test
Comments
Confirm delete:
Do you really want to delete benchmark?