Benchmark: spread vs individual

Script Preparation code:

var data = [1, 2, 3, 4, 5, 6]

function fn(a1, a2, a3, a4, a5, a6) {
    console.log(a1 + a2 + a3 + a4 + a5 + a6)
}

Tests:

spread
for (let i = 0; i < 9999; ++i) { fn(...data); }
individual
for (let i = 0; i < 9999; ++i) { fn(data[0], data[1], data[2], data[3], data[4], data[5]); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
individual

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser/OS: Firefox 122 on Windows

View result in a separate tab

Test name	Executions per second
spread	27.7 Ops/sec
individual	25.9 Ops/sec

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 benchmark.

The benchmark is testing two approaches for calling the `fn` function with six arguments: spreading an array into individual arguments versus using individual elements of the array.

**Approaches:**

1. **Spread approach (`"spread"`):**
	* The `fn` function is called like this: `fn(...data);`
	* This means that all elements of the `data` array are passed as separate arguments to the `fn` function.
2. **Individual approach (`"individual"`):**
	* The `fn` function is called like this: `fn(data[0], data[1], data[2], data[3], data[4], data[5]);`
	* This means that each element of the `data` array is passed as a separate argument to the `fn` function.

**Pros and Cons:**

1. **Spread approach:**
	* Pros:
		+ Can be more concise and readable in some cases.
		+ Allows for easier extension or modification of the number of arguments.
	* Cons:
		+ May incur additional overhead due to the spreading operation.
2. **Individual approach:**
	* Pros:
		+ Can be more efficient, as it avoids the overhead of spreading the array.
	* Cons:
		+ May be less concise and readable.

**Other considerations:**

* The benchmark is testing both approaches in a loop, with 9999 iterations each. This helps to emphasize any differences in performance between the two approaches.
* The benchmark uses Firefox 122 as the browser, which may impact the results due to optimizations or implementation details specific to this browser version.

**Library usage:**
There is no explicit library usage mentioned in the benchmark definition or test cases. However, it's worth noting that some JavaScript engines or browsers might have built-in functions or optimizations that affect how arrays are spread or used as individual elements.

No special JavaScript features or syntax are being tested in this benchmark. The focus is on comparing the performance of two distinct approaches to calling a function with multiple arguments.

**Alternatives:**
Other alternatives for spreading an array into individual arguments include:

* Using `Array.prototype.slice()` or other methods to extract individual elements from the array.
* Utilizing functional programming concepts, such as destructuring or mapping functions, to work with arrays in more expressive ways.

Keep in mind that these alternatives might not necessarily change the performance characteristics of the benchmarked approaches.

Related benchmarks:

spread vs individual (version: 0)

Comparing performance of: spread vs individual

Created: 2 years ago by: Guest

Jump to the latest result

spread

individual

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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