Benchmark: Spread operator vs apply - jnslg

Script Preparation code:

function test() {
    ;
}
var using = (new Array(200)).fill(null).map((e, i) => (i));

Tests:

spread
test(...using);
apply
test.apply(null, using)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
apply

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in this JavaScript benchmark.

**Benchmark Overview**

The benchmark is comparing the performance of two ways to call a function with arbitrary arguments dynamically:

1. **Spread Operator (`...`)**: This method uses the spread operator to pass an array as individual arguments.
2. **`apply()` Method**: This method takes an object, followed by its method name, and then individual arguments.

**Options Compared**

The benchmark is comparing the performance of these two approaches when calling a function with 200 null elements in the `using` array.

**Pros and Cons of Each Approach**

1. **Spread Operator (`...`)**
	* Pros:
		+ More readable and concise code.
		+ Less boilerplate code compared to `apply()`.
	* Cons:
		+ May lead to slower performance due to the creation of an intermediate array.
2. **`apply()` Method**
	* Pros:
		+ Can be faster in some cases, especially for large arrays or when used with a specific optimization.
	* Cons:
		+ Requires more boilerplate code and can make the call more verbose.

**Library Used**

In this benchmark, no external libraries are used. The test function `test()` is defined without any dependencies.

**Special JavaScript Feature/Syntax**

None mentioned in the provided information.

**Other Alternatives**

If you want to explore alternative approaches for calling a function with arbitrary arguments dynamically, some other methods include:

1. **`call()` Method**: Similar to `apply()`, but takes an optional third argument.
2. **`new.target` Trick**: A technique used to call a function like it's called as the constructor of an object.

However, these alternatives are not being tested in this specific benchmark.

**Benchmark Preparation Code**

The preparation code provided is:
```javascript
function test() {
  ;
}

var using = (new Array(200)).fill(null).map((e, i) => (i));
```
This code defines a `test()` function and an array `using` with 200 null elements. The spread operator is used to create the array.

**Individual Test Cases**

The benchmark consists of two test cases:

1. **`spread`**: Calls the `test()` function using the spread operator with the `using` array as individual arguments.
2. **`apply`**: Calls the `test()` function using the `apply()` method with the `using` array as its third argument.

The benchmark measures the performance of these two approaches in terms of executions per second.

Related benchmarks:

Spread operator vs apply - jnslg (version: 0)

Compare the differing ways you can call a function with arbitrary arguments dynamically

Comparing performance of: spread vs apply

Created: 5 years ago by: Guest

Jump to the latest result

spread

apply

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):