Benchmark: sort vs reduce for a few elements

Script Preparation code:

var a=Array.from({length:5},()=>Math.random())

Tests:

sort
var b = a.slice(); b.sort((c, d) => c - d);
reduce
a.reduce((a,c) => a < c ? a : c)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
sort
reduce

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
sort	5038775.0 Ops/sec
reduce	27043794.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested, compared, and other considerations.

**What is being tested?**

The benchmark compares two approaches for sorting an array of numbers: `sort()` and `reduce()`. The test case generates an array of 5 random numbers using `Array.from()` and then applies each sorting approach to the array.

**Options compared:**

There are two options compared:

1. **`sort()`**: This is a built-in JavaScript method that sorts the elements of an array in place, based on the provided comparison function.
2. **`reduce()`**: This is another built-in JavaScript method that applies a reduction function to each element of the array, accumulating a value.

**Pros and Cons:**

* `sort()`: Pros:
	+ Efficient for small arrays (O(n log n))
	+ Built-in method, so it's well-optimized
	+ Easy to understand and use
* Cons:
	+ Not designed for in-place sorting (it creates a new array)
	+ Can be slow for very large arrays
* `reduce()` Pros:
	+ Can be used for both reduction and aggregation operations
	+ In-place, so it's efficient for large arrays
	+ Allows for more control over the sorting process
* Cons:
	+ Less intuitive than `sort()`
	+ Requires careful handling of edge cases

**Library:**

There is no explicit library mentioned in this benchmark. However, if we consider the `Array.from()` method used to generate the random array, it's a part of the ECMAScript Standard Library.

**Special JavaScript feature or syntax:**

The use of arrow functions (e.g., `(c, d) => c - d`) and template literals (`var b = a.slice();\r\nb.sort((c, d) => c - d);`) are examples of modern JavaScript features. These features provide concise ways to write code, but they may not be supported by older browsers or environments.

**Alternatives:**

If you wanted to use alternative sorting methods, some options could include:

* `Array.prototype.slice()` followed by `sort()`: This would create a new array and then sort it.
* A custom sorting function using a loop: This would provide more control over the sorting process but might be slower than the built-in methods.

Other alternatives for reducing an array to a single value could include:

* Using `Array.prototype.every()` or `Array.prototype.some()`: These methods return a boolean indicating whether all elements in the array pass a test.
* Using a loop: This would provide more control over the reduction process but might be slower than the built-in methods.

Keep in mind that these alternatives may not be as efficient or intuitive as the built-in methods.

Related benchmarks:

sort vs reduce for a few elements (version: 0)

Comparing performance of: sort vs reduce

Created: 3 years ago by: Guest

Jump to the latest result

sort

reduce

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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