Benchmark: array find vs some for array of objects

Tests:

array find
var a = [{id:1}, {id:2}, {id:3}, {id:4}, {id:5}, {id:6}, {id:7}, {id:8}]; var b = a.find(({id}) => id === 4);
array some
var a = [{id:1}, {id:2}, {id:3}, {id:4}, {id:5}, {id:6}, {id:7}, {id:8}]; var b = a.some(({id}) => id === 4);

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

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

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Let's break down the benchmark and explain what's being tested.

**What is being tested?**

The provided JSON represents a JavaScript microbenchmark that compares two array methods: `Array.prototype.find` and `Array.prototype.some`. The benchmark creates an array of objects with an "id" property and then uses these methods to search for an object with a specific "id" value (in this case, 4).

**Options being compared**

The benchmark is comparing the performance of two approaches:

1. **Array.prototype.find**: This method returns the first element in the array that satisfies the provided condition. If no elements satisfy the condition, it returns `undefined`.
2. **Array.prototype.some**: This method returns a boolean value indicating whether at least one element in the array satisfies the provided condition.

**Pros and cons of each approach**

* **Array.prototype.find**:
	+ Pros: Finds the first matching element, which can be useful if you need to access other properties of the matching object.
	+ Cons: May return `undefined` if no elements satisfy the condition, which can lead to unexpected behavior in some cases.
* **Array.prototype.some**:
	+ Pros: Returns a boolean value indicating whether any elements satisfy the condition, which can be useful for early termination or when you don't need to access other properties of the matching object.
	+ Cons: Finds the first element that satisfies the condition, regardless of whether it's the only one.

**Library and purpose**

There is no explicit library being used in this benchmark. The `Array.prototype.find` and `Array.prototype.some` methods are part of the standard JavaScript API.

**Special JS feature or syntax**

This benchmark uses a modern JavaScript feature called "template literals" (`var b = a.find(({id}) => id === 4);`). Template literals allow you to embed expressions inside string literals, making it easier to write concise and readable code. This feature was introduced in ECMAScript 2015 (ES6).

**Other alternatives**

If you wanted to use alternative approaches for finding an element in an array, you could consider:

* Using a traditional `for` loop or `while` loop to iterate over the elements of the array.
* Using a library like Lodash's `findWhere` function.
* Using a functional programming approach with a higher-order function like `Array.prototype.every` or `Array.prototype.reduce`.

Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to using `Array.prototype.find` and `Array.prototype.some`.

Related benchmarks:

array find vs some for array of objects (version: 0)

Compare Array.prototype.find and Array.prototype.some

Comparing performance of: array find vs array some

Created: 3 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):