Benchmark: Find vs some - MeasureThat.net

Tests:

find
var a = ['hello', 'a', 'bc']; var b = a.find(item => item === 'bc');
some
var a = ['hello', 'a', 'bc']; var b = a.some(item => item === 'bc');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
find
some

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net and understand what's being tested in this benchmark.

**Benchmark Overview**

The provided benchmark is designed to compare the performance of two methods: `find` and `some`, which are both used to test for the presence of a specific element within an array. The benchmark uses a simple JavaScript script that creates an array with three elements: "hello", "a", and "bc".

**Options Being Compared**

The two options being compared are:

1. `Array.prototype.find()`: This method returns the first element in the array that satisfies the provided testing function.
2. `Array.prototype.some()`: This method returns a boolean value indicating whether at least one element in the array satisfies the provided testing function.

**Pros and Cons of Each Approach**

**`find()`:**

Pros:

* More efficient than `some()` when only one matching element is expected, as it stops iterating as soon as it finds the first match.
* Can be more readable and intuitive for developers who are familiar with its usage.

Cons:

* Requires that at least one matching element exists in the array. If no elements match, it will return `undefined`.
* May not be suitable for cases where you need to find all matching elements.

**`some()`:**

Pros:

* More flexible than `find()`, as it can stop iterating as soon as any matching element is found.
* Can be used in scenarios where you need to find all matching elements, regardless of the size of the array.

Cons:

* May iterate over the entire array even if only one element matches, which can be less efficient than `find()` for large arrays.
* May return false if no elements match, whereas `find()` would return `undefined`.

**Library and Special JS Feature**

In this benchmark, there are no libraries being used or special JavaScript features that need to be explained.

**Other Considerations**

When designing a performance benchmark like this one, it's essential to consider factors such as:

* Input size: The size of the array being tested can significantly impact performance. A larger input may favor `some()` over `find()`.
* Data distribution: The distribution of data within the array can affect performance. For example, if the data is sparse (i.e., most elements are null or undefined), `some()` might be slower due to unnecessary iterations.
* Cache locality: Some browsers cache arrays differently, which can impact performance.

**Alternatives**

If you're interested in exploring other JavaScript methods for finding elements within an array, some alternatives include:

* `includes()`: This method returns a boolean value indicating whether the array contains a specific element. While not designed specifically for performance comparison, it's often more readable and efficient than `find()` or `some()`.
* Custom iteration: In some cases, you might consider implementing your own custom loop to iterate over the array, using index-based access. However, this approach is generally less concise and more error-prone.

In summary, the MeasureThat.net benchmark provides a useful comparison of the performance differences between `find()` and `some()` in JavaScript. Understanding the pros and cons of each approach can help developers make informed decisions about which method to use in their own codebases.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36

Browser/OS: Chrome 94 on Windows

View result in a separate tab

Test name	Executions per second
find	203768576.0 Ops/sec
some	203515024.0 Ops/sec

Related benchmarks:

Find vs some (version: 0)

Comparing performance of: find vs some

Created: 5 years ago by: Guest

Jump to the latest result

find

some

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):