Benchmark: Spread with tuples

Script Preparation code:

function generate(i) {
  if (i % 5) {
    return [{ hi: '5' }, true, false];
  }
  return [{ ho: '5' }, false, true];
}

Tests:

Spread
function chain(i) { return [...generate(i), 'greater']; } for (var i=0;i<1000;i++) { chain(i); }
Explicit
function chain(i) { const ret = generate(i); return [ret[0], ret[1], ret[2], 'greater']; } for (var i=0;i<1000;i++) { chain(i); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread
Explicit

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 its test cases.

**Benchmark Definition**

The benchmark is defined by two JavaScript functions: `generate` and `chain`. The `generate` function returns an array of three elements, including an object with properties `hi`, `ho`, and boolean values. The `chain` function takes this generated array and appends a string `'greater'` to it.

**Test Cases**

There are two test cases:

1. **Spread**: This test case uses the spread operator (`...`) to create a new array by concatenating the result of `generate(i)` with the string `'greater'`. The loop runs 1000 times, calling the `chain(i)` function on each iteration.
2. **Explicit**: This test case uses explicit array indexing to access the elements of the generated array. Instead of using the spread operator, it directly accesses the first three elements of the result and appends the string `'greater'` to it.

**Options Compared**

The two test cases compare the performance of using the spread operator versus explicit array indexing when concatenating arrays.

**Pros and Cons**

* **Spread Operator (Test Case: Spread)**:
	+ Pros:
		- Concise and readable syntax
		- Efficient use of memory, as it creates a new array without copying the original elements
	+ Cons:
		- Might be slower due to the overhead of creating a new array
* **Explicit Array Indexing (Test Case: Explicit)**:
	+ Pros:
		- Can be faster for large arrays, as it avoids the overhead of creating a new array
	+ Cons:
		- Less readable and more verbose syntax

**Library Usage**

None of the test cases explicitly use any libraries. The `generate` function appears to be a custom implementation.

**Special JS Feature/Syntax**

The test cases utilize the spread operator (`...`) which is a modern JavaScript feature introduced in ES6. It allows for concise array creation and concatenation.

**Other Alternatives**

If you wanted to modify these test cases, here are some alternative approaches:

* Using `Array.prototype.push()` instead of the spread operator or explicit indexing
* Using `concat()` instead of the spread operator
* Using a different data structure, such as an array-like object with push() and shift()
* Adding additional test cases using other concatenation methods, such as `Array.prototype.join()`

Keep in mind that these alternatives might affect the performance and readability of your code.

Related benchmarks:

Spread with tuples (version: 0)

Comparing performance of: Spread vs Explicit

Created: 3 years ago by: Registered User

Jump to the latest result

Spread

Explicit

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):