<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.5/lodash.min.js"></script>
var firstEqual = [];
var secondEqual = [];
for (var i=0; i<=100; i++) {
firstEqual.push(i);
secondEqual.push(i);
}
var arrayToDedup = [firstEqual, secondEqual];
_.uniq(arrayToDedup);
[new Set(arrayToDedup)]
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
tets1 | |
test2 |
Test name | Executions per second |
---|---|
tets1 | 166385.8 Ops/sec |
test2 | 204625.0 Ops/sec |
Let's break down the provided benchmark and its various components.
Benchmark Definition JSON
The benchmark definition is a JSON object that represents a JavaScript microbenchmark. It contains the following properties:
Name
: A unique identifier for the benchmark.Description
: A brief description of the benchmark.Script Preparation Code
: The code used to prepare the input data for the benchmark. In this case, it creates two arrays (firstEqual
and secondEqual
) and adds 101 numbers (0-100) to each array, which is then concatenated using the spread operator ([...firstEqual, ...secondEqual]
). This creates a large array of duplicates.Html Preparation Code
: The HTML code used to include a library in the benchmark. In this case, it includes the Lodash library version 4.17.5.Individual Test Cases
The benchmark definition contains two individual test cases:
test1
: Uses the _uniq
function from the Lodash library to remove duplicates from the arrayToDedup
array.test2
: Uses the spread operator ([...new Set(arrayToDedup)]
) to create a new set from the arrayToDedup
array and then converts it back to an array.Options Compared
The two test cases compare the performance of two approaches to remove duplicates from an array:
_uniq
function: This approach uses a library function specifically designed for removing duplicates.Set
: This approach uses the spread operator to create a new set, which automatically removes duplicates.Pros and Cons
Here's a brief summary of the pros and cons of each approach:
_uniq
function:Set
:Library - Lodash
The Lodash library is a popular JavaScript utility library that provides various functions for tasks such as array manipulation, object manipulation, and more. The _uniq
function is part of this library and is specifically designed to remove duplicates from an array.
Special JS Feature/Syntax - None
There are no special JavaScript features or syntax used in this benchmark.
Other Alternatives
If you don't want to use the Lodash library or the spread operator with Set
, you could also consider other approaches, such as:
_uniq
function.filter
method to remove duplicates from the array.However, these alternatives may not be as efficient or optimized as the Lodash approach or the spread operator with Set
.