<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>function getRandomInt(max) { return Math.floor(Math.random() * max);}var arr2 = [];var arr1 = [];for(var index1123123; index1123123 <= 1000000; index1123123++ ){ const i = getRandomInt(1000); const o = getRandomInt(1000); arr1.push(i); arr2.push(o);}_.isEqual(arr1, arr2);const mytest = _.difference(arr1, arr2);(mytest.length == 0)--enable-precise-memory-info flag.
| Test case name | Result |
|---|---|
| Lodash.js isEqual | |
| lodash.js difference |
| Test name | Executions per second |
|---|---|
| Lodash.js isEqual | 1776662.8 Ops/sec |
| lodash.js difference | 1860018.6 Ops/sec |
Let's break down the provided JSON and explain what is being tested, compared, and other considerations.
Benchmark Definition
The benchmark definition represents two test cases:
_.isEqual(arr1, arr2);const mytest = _.difference(arr1, arr2) && (mytest.length == 0);Both tests are comparing the equality of two arrays, arr1 and arr2.
Options Compared
Two approaches are being compared:
isEqual method: This method checks if two arrays are identical, including their order and values.difference method with a conditional assertion: This method returns the difference between two arrays and assigns it to mytest. The test then checks if mytest is empty.Pros and Cons of each approach
isEqual method:difference method with a conditional assertion:isEqual method due to the additional computation.Library: Lodash
Lodash is a popular JavaScript library that provides various utility functions for tasks like array manipulation, object processing, and more. The isEqual, difference, and other methods are part of this library. By using Lodash, developers can leverage its extensive set of algorithms and data structures to simplify their code.
Special JS Feature or Syntax
There doesn't appear to be any special JavaScript features or syntax used in the provided benchmark definition. However, it's worth noting that the use of const for variable declarations is a modern JavaScript feature (ES6+) that was adopted relatively recently.
Other Alternatives
If you don't want to rely on Lodash, you could implement your own array comparison functions using JavaScript's built-in methods, such as:
isEqual: Compare each element of the arrays individually or use a library like arrays-equal.difference: Use a loop or a library like lodash-difference (which is similar to Lodash but doesn't include all its features).Keep in mind that writing your own array comparison functions can be more verbose and error-prone than using a well-tested library like Lodash.
Benchmark Preparation Code
The preparation code generates two large arrays, arr1 and arr2, with random integers. This creates a microbenchmark scenario where the performance of isEqual and difference methods is measured against each other.
Test Results
The latest benchmark results show that Chrome 101 has faster executions per second for both tests. However, since the difference in performance is relatively small (about 12%), it might not be noticeable in real-world applications.
