Benchmark: array find vs for of test JM1

HTML Preparation code:

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

Tests:

array find
var a = ['hello', 'a', 'bc']; var b = a.find(item => item === 'bc');
array some
var a = ['hello', 'a', 'bc']; var b; for (const item of a) { if (item === 'bc') { b = item; break; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array find
array 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 to explain what is being tested and compare different approaches.

**Benchmark Definition:**
The benchmark compares two approaches to find an element in an array:

1. **ES6 spread operator (`...`)**: This method creates a new array with the elements of the original array, filtered by the condition.
2. **Traditional `concat()` method**: This method concatenates multiple arrays together and then filters the resulting array.

**Script Preparation Code and HTML Preparation Code:**
The script preparation code is empty, which means no custom initialization or setup code is required for the benchmark. The HTML preparation code includes a link to include the Lodash library, which provides a `find()` function used in one of the test cases.

**Test Cases:**

1. **`array find`**: This test case uses the ES6 spread operator (`...`) to filter the array.
2. **`array some`**: This test case uses a traditional `for...of` loop with an `if` statement to filter the array. The `break` keyword is used when the condition is met.

**Options Compared:**

* ES6 spread operator (`...`)
* Traditional `concat()` method

**Pros and Cons:**

* **ES6 spread operator (`...`)**:
	+ Pros:
		- More concise and expressive
		- Faster execution (usually)
	+ Cons:
		- May not be supported in older browsers or environments
		- Can lead to slower performance if the array is very large
* **Traditional `concat()` method**:
	+ Pros:
		- Wide support across modern browsers and environments
		- Easy to understand for those familiar with traditional array manipulation methods
	+ Cons:
		- More verbose and less concise
		- Generally slower than the ES6 spread operator

**Library:**
Lodash is used in one of the test cases (`array find`). Lodash provides a `find()` function that returns the first element in the array that satisfies the provided condition.

**Special JS Feature or Syntax:**
The benchmark does not use any special JavaScript features or syntax. It only utilizes standard ES6 features (e.g., template literals, arrow functions).

**Other Alternatives:**

* Other ways to filter an array include using `filter()` with a callback function or using the `every()` and `some()` methods.
* For very large arrays, alternative data structures like `Set` or `Map` might be more suitable for efficient filtering.

Keep in mind that the performance differences between these approaches can vary depending on the specific use case, array size, and browser/environment.

Related benchmarks:

array find vs for of test JM1 (version: 0)

Compare the new ES6 spread operator with the traditional concat() method

Comparing performance of: array find vs array some

Created: 4 years ago by: Guest

Jump to the latest result

array find

array 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):