Benchmark: Test find x 2 vs forEach + some

Script Preparation code:

var arr = [{
    "distributionId": 4,
    "numberOfTickets": 10,
    "teams": [
        {
            "teamId": 1,
            "teamName": "All Teams",
            "teamTypeId": 5
        },
        {
            "teamId": 8,
            "teamName": "Alabama",
            "teamTypeId": 1
        },
        {
            "teamId": 12,
            "teamName": "California",
            "teamTypeId": 1
        }
    ]
}];

Tests:

find().find()
arr.find( (ticket) => ticket.teams.find( (team) => team.teamName === 'All Teams' ) )
flatMap().find()
arr.forEach((ticket) => ticket.teams.some( (team) => team.teamName === 'All Teams' ) );

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
find().find()
flatMap().find()

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 JSON and analyze what is being tested.

**Benchmark Definition**

The benchmark definition provides two test cases:

1. `arr.find((ticket) => ticket.teams.find((team) => team.teamName === 'All Teams'))`
2. `arr.forEach((ticket) => ticket.teams.some((team) => team.teamName === 'All Teams'));`

These test cases aim to find an object in the `arr` array that has a team with a specific name ('All Teams').

**Options Compared**

The two test cases compare the performance of:

1. **`find()`**: A method that returns the first element in the array that satisfies the provided condition.
2. **`forEach()` + `some()`**: A combination of two methods:
	* `forEach()`: Iterates over each element in the array and executes a callback function for each one.
	* `some()`: Returns `true` if at least one element in the array satisfies the provided condition.

**Pros and Cons**

1. **`find()`**:
	* Pros:
		+ Efficient when only the first matching element is needed.
		+ Less overhead compared to iterating over the entire array.
	* Cons:
		+ Returns `undefined` if no elements match, which might lead to errors in certain scenarios.
2. **`forEach()` + `some()`**:
	* Pros:
		+ More flexible than `find()`, as it can be used for more complex conditions or when multiple elements need to match.
		+ Returns a boolean value indicating whether at least one element matches, making it easier to handle different scenarios.
	* Cons:
		+ Requires iterating over the entire array, which might lead to higher overhead compared to `find()`.

**Other Considerations**

* The benchmark definition uses a nested object structure (`ticket.teams`) and an arrow function with a callback function (`(team) => ...`).
* The test cases do not use any external libraries or special JavaScript features.
* The benchmark result shows the execution count per second for each test case, providing insight into their relative performance.

**Alternatives**

Other approaches that could be used to find the first matching object in an array include:

1. `indexOf()` or `includes()`: These methods can be used to find the index of the first element that matches a condition, but they may not be as efficient as `find()` for large arrays.
2. Custom loops: Writing a custom loop using `for` or `while` statements could also be used to iterate over the array and find the first matching object.

However, these alternatives are likely to have higher overhead compared to the `find()` method, making it a good starting point for benchmarking performance comparisons.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
find().find()	17338530.0 Ops/sec
flatMap().find()	16896994.0 Ops/sec

Related benchmarks:

Test find x 2 vs forEach + some (version: 0)

Comparing performance of: find().find() vs flatMap().find()

Created: one year ago by: Guest

Jump to the latest result

find().find()

flatMap().find()

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):