Benchmark: Array.find vs Array.some array of objects

Script Preparation code:

window.source = [{"bookingId" : "6a322364-6947-4203-aad3-7084a65da624"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da623"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da622"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da621"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da624"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da626"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da627"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da628"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da629"}, {"bookingId" : "6a322364-6947-4203-aad3-7084a65da630"}];

Tests:

Array.find
const result = !!source.find(booking => booking.bookingId === "6a322364-6947-4203-aad3-7084a65da629");
Array.some
const result = source.some(booking => booking.bookingId === "6a322364-6947-4203-aad3-7084a65da629");

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

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, the different approaches compared, their pros and cons, and other considerations.

**Benchmark Definition**

The benchmark measures the performance difference between two JavaScript methods:

1. `Array.find()`
2. `Array.some()`

Both methods are used to search for a specific condition within an array of objects. However, they serve slightly different purposes:

* `Array.find()` returns the first element that satisfies the provided condition. If no elements satisfy the condition, it returns undefined.
* `Array.some()` returns true as soon as at least one element in the array satisfies the provided condition. If no elements satisfy the condition, it returns false.

**Options Compared**

The benchmark compares the performance of two approaches:

1. **`Array.find()`**: Using `Array.find()` to search for an object with a specific booking ID.
2. **`Array.some()`**: Using `Array.some()` to check if at least one object in the array has a matching booking ID.

**Pros and Cons**

* **`Array.find()`**:
	+ Pros:
		- More concise and expressive syntax
		- Can be more efficient for finding a single element that satisfies a condition
	+ Cons:
		- May return undefined if no elements satisfy the condition, which can lead to unexpected behavior in some cases
		- Can be slower than `Array.some()` if the array is very large and most elements do not match the condition
* **`Array.some()`**:
	+ Pros:
		- Returns a boolean value (true or false) that indicates whether at least one element matches the condition
		- Does not return undefined, making it more predictable in some cases
	+ Cons:
		- Less concise and expressive syntax compared to `Array.find()`
		- Can be slower than `Array.find()` for very large arrays where most elements do not match the condition

**Library Used**

In this benchmark, no specific library is used beyond the built-in JavaScript arrays.

**Special JS Features/Syntax**

None are mentioned in this particular benchmark. However, it's worth noting that some other special features or syntax might be used in future benchmarks, such as:

* `let` or `const` declarations for variable scoping
* `arrow functions`
* Promises and async/await syntax
* WebAssembly support

**Other Considerations**

When choosing between `Array.find()` and `Array.some()`, consider the following:

* If you need to find a single element that satisfies a condition, use `Array.find()`.
* If you need to check if at least one element in an array matches a certain condition, use `Array.some()`.
* If performance is critical for very large arrays, consider using `Array.prototype.findIndex()` or other specialized methods.
* Always be aware of the potential pitfalls of returning undefined from a function.

**Alternatives**

Some alternative approaches to searching arrays might include:

* Using `Array.prototype.indexOf()` and checking for -1
* Using a `for` loop or `forEach()` to iterate over the array
* Using a library like Lodash, which provides more expressive and performant methods for working with arrays

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36

Browser/OS: Chrome 88 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array.find	5766050.5 Ops/sec
Array.some	5851092.5 Ops/sec

Related benchmarks:

Array.find vs Array.some array of objects (version: 0)

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>

Experimental features:

Fastest: N/A

Slowest: N/A

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