Benchmark: async for vs promise.all 222

Script Preparation code:

async function asyncFor(){
    for (const x of [1, 2, 3]) {
        await new Promise(resolve => resolve(x > 0));
    }
}

async function asyncPromiseAll() {
    await Promise.all([1, 2, 3].map(x =>
        new Promise(resolve => resolve(x > 0))
    ));
}

Tests:

asyncFor
asyncFor()
asyncPromiseAll
asyncPromiseAll()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
asyncFor
asyncPromiseAll

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark compares two approaches to handling asynchronous operations in JavaScript: `async for` and `Promise.all`. The goal is to determine which approach is faster and more efficient.

**Options Compared**

The benchmark tests two options:

1. **Async For**: This approach uses a traditional `for` loop with an `await` statement inside the loop to wait for each iteration.
2. **Promise.all**: This approach uses the `Promise.all` method to execute an array of promises in parallel and waits for all of them to resolve.

**Pros and Cons**

1. **Async For**:
	* Pros: Easier to read and understand, especially for developers familiar with traditional `for` loops.
	* Cons: Can be slower due to the overhead of creating and waiting for promises, as well as the potential for blocking behavior if not used carefully.
2. **Promise.all**:
	* Pros: More concise and expressive, allowing for parallel execution of multiple operations.
	* Cons: Can be less readable and may require additional error handling.

**Library Usage**

The benchmark uses the `Promise` class from the JavaScript standard library to create promises that resolve after a certain condition is met. The `await` keyword is also used to wait for the resolution of these promises.

**Special JS Features/Syntax**

This benchmark does not use any special JavaScript features or syntax beyond what is commonly used in modern JavaScript development.

**Other Alternatives**

There are other approaches to handling asynchronous operations, such as:

1. **Callbacks**: Using callback functions to handle the result of an asynchronous operation.
2. **Generators**: Using generators to create iterators that can be paused and resumed at specific points.
3. **Closures**: Using closures to encapsulate variables and functions, which can be useful for handling asynchronous operations.

These alternatives may have different trade-offs in terms of readability, performance, and complexity compared to the `async for` and `Promise.all` approaches tested by this benchmark.

Related benchmarks:

async for vs promise.all 222 (version: 0)

Comparing performance of: asyncFor vs asyncPromiseAll

Created: 2 years ago by: Guest

Jump to the latest result

asyncFor

asyncPromiseAll

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):