<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>
window.foo = ['cat', 'dog', 'bird'];
window.bar = ['cat', 'dog', 'bird'];
_.isEqual(window.foo, window.bar)
window.foo.join() === window.bar.join();
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
isEqual | |
join |
Test name | Executions per second |
---|---|
isEqual | 1884073.6 Ops/sec |
join | 2295360.8 Ops/sec |
Let's break down the provided benchmark definition and test cases to understand what is being tested.
Benchmark Definition
The benchmark measures the performance of two approaches:
_.isEqual(window.foo, window.bar)
using Lodashwindow.foo.join() === window.bar.join()
without any additional librariesScript Preparation Code
The script preparation code sets up two variables, foo
and bar
, which are arrays of strings:
window.foo = ['cat', 'dog', 'bird'];
window.bar = ['cat', 'dog', 'bird'];
These arrays contain the same elements.
Html Preparation Code
The HTML preparation code includes a script tag that loads the Lodash library (version 4.17.4):
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>
Individual Test Cases
There are two test cases:
isEqual
The benchmark definition is _.isEqual(window.foo, window.bar)
. This uses the Lodash library to compare the equality of the two arrays.
join
The benchmark definition is window.foo.join() === window.bar.join()
. This does not use any additional libraries and only relies on the built-in join()
method for string concatenation.
Pros, Cons, and Considerations
Lodash.isEqual (isEqual)
Pros:
Cons:
Considerations:
join
Pros:
Cons:
Considerations:
Library: Lodash
Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, string iteration, and more. In this benchmark, the _.isEqual
function is used to compare the equality of two arrays. The Lodash library adds extra functionality but can also introduce performance overhead.
Special JS Feature/Syntax
There are no special JavaScript features or syntax used in these test cases. However, if you're interested in exploring other approaches that use modern JavaScript features like async/await, promises, or TypeScript, those could be discussed as alternative methods.
Other Alternatives
If you're looking for alternatives to this benchmark, here are a few options:
_.isEqual
, you can use the every()
method to compare arrays element-wise.includes()
method instead of concatenating strings with +
.These alternatives might provide different performance characteristics or trade-offs in terms of code readability and maintainability.