Benchmark: Spread vs Apply 43854395

Script Preparation code:

var array = Array(1000).fill(50);

function getAverage(...nums) {
    return nums.reduce((a, b) => a + b, 0) / nums.length || 0;
}

Tests:

Spread
getAverage(...array);
Apply
getAverage.apply(null, array);

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.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is being tested?**

The benchmark compares two approaches to call the `getAverage` function: using the spread operator (`...`) and using `apply()`.

**The functions being called**

The `getAverage` function takes an array of numbers as input and returns their average value. The function uses the `reduce()` method, which is a built-in JavaScript method that applies a binary operation to all items in an array.

Here's the relevant code:
```javascript
function getAverage(...nums) {
  return nums.reduce((a, b) => a + b, 0) / nums.length || 0;
}
```
This function uses destructuring (`...`) to capture any number of arguments as separate variables. It then uses `reduce()` to sum up the values in the array and returns the average.

**Options being compared**

There are two options being compared:

1. **Spread operator (`...`)**: This is a new syntax introduced in ECMAScript 2015 (ES6) that allows you to capture any number of arguments as separate variables.
2. **`apply()` method**: This is a built-in JavaScript method that calls a function with a given `this` value and an array of arguments.

**Pros and cons**

**Spread operator (`...`)**

Pros:

* More concise and expressive code
* Easier to read and understand, especially for large arrays

Cons:

* May be slower than `apply()` due to the overhead of parsing and executing the spread syntax

**`apply()` method**

Pros:

* Faster execution time due to the simplicity of the `apply()` call
* Can be useful when you need more control over the function invocation (e.g., setting a custom `this` value)

Cons:

* Less concise and expressive code compared to the spread operator
* May require more effort to read and understand, especially for large arrays

**Other considerations**

* The benchmark measures the average execution time of both options, which may not accurately reflect real-world performance differences.
* The specific use case of `getAverage` might be optimized or cached by JavaScript engines, which could affect the results.
* MeasureThat.net's benchmarking framework uses a browser emulator to run the tests, which can introduce additional variability.

**Library and special JS features**

No libraries are used in this benchmark. However, it does utilize some modern JavaScript features:

* Destructuring (`...`) introduced in ECMAScript 2015 (ES6)
* Spread syntax is supported by most modern browsers
* `apply()` method is a built-in JavaScript method

**Alternatives**

If you're looking for alternative ways to call functions with an array of arguments, consider using other methods like:

* Using `forEach()` or `map()` with a callback function
* Utilizing functional programming concepts like currying or partial applications

Related benchmarks:

Spread vs Apply 43854395 (version: 0)

Comparing performance of: Spread vs Apply

Created: 2 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):