Benchmark: foreach vs some - MeasureThat.net

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>

Tests:

foreach
var a = ['hello', 'a', 'bc','d','e','f','sdf']; var result = false; a.forEach(i=>{ if(i==='bc') { result = true; } });
some
var a = ['hello', 'a', 'bc','d','e','f','sdf']; var b = a.some(item => item === 'bc');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
foreach
some

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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Let's break down the provided JSON data and explain what's being tested in each benchmark.

**Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The goal of these benchmarks is to compare the performance of different approaches to achieve a specific result.

**Benchmark Definition**

The benchmark definition provides a brief description of the test, which in this case is comparing two methods: `forEach` and `some`. The script preparation code is empty, indicating that no additional setup or dependencies are required for the tests. However, it's worth noting that the benchmark uses Lodash.js library, which is imported via an HTML script tag.

**Individual Test Cases**

There are only two test cases:

1. **foreach**: This test case uses a JavaScript array `a` with six elements and iterates over it using the `forEach` method. The callback function checks if the current element is `'bc'`, and if so, sets a variable `result` to `true`. The test measures how long it takes for this loop to execute.
2. **some**: This test case uses the same JavaScript array `a` as above but uses the `some` method instead of `forEach`. The callback function checks if the current element is `'bc'`, and if so, returns a boolean value indicating whether the loop should continue.

**Library: Lodash.js**

Lodash.js is a popular utility library for JavaScript that provides a collection of functional programming helpers. In this benchmark, Lodash.js is used to provide a default value for the `result` variable in both test cases.

Pros and Cons:

* Pros:
	+ Simplifies the code by providing an initial value for `result`.
	+ Avoids having to use a global or function-scoped variable.
* Cons:
	+ May introduce additional overhead due to the library import and its execution time.
	+ Could affect the results if not optimized correctly.

**Special JS Feature/Syntax**

There's no special JavaScript feature or syntax being tested in these benchmarks. The code is standard JavaScript, with no experimental features like `async/await` or ES modules.

**Other Alternatives**

If you wanted to run a similar benchmark, you could consider alternative approaches:

1. **Using a native JavaScript method**: Instead of using Lodash.js, you could use the built-in `forEach` and `some` methods in vanilla JavaScript.
2. **Looping manually**: You could write a custom loop using a `for` or `while` loop instead of relying on the `forEach` and `some` methods.
3. **Using a different library**: Depending on your specific needs, you might consider using other libraries like Ramda.js or Underscore.js, which offer similar functionality to Lodash.js.

Keep in mind that these alternatives would require significant changes to the benchmark code and setup.

Related benchmarks:

foreach vs some (version: 0)

Comparing performance of: foreach vs some

Created: 5 years ago by: Guest

Jump to the latest result

foreach

some

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):