Benchmark: Array.prototype.sort (objects vs integers)

Script Preparation code:

function randomDate(start, end) {
    return new Date(start.getTime() + Math.random() * (end.getTime() - start.getTime()));
}

var arrObjects = [];
for(var i = 0; i < 100000; i++){
  arrObjects.push({value:randomDate(new Date(2012, 0, 1), new Date())});
}

function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}

var arrIntegers = [];
for(var i = 0; i < 100000; i++){
  arrIntegers.push({value:getRandomInt(100)});
}

Tests:

sort array of date property inside objects
arrObjects.sort((a,b) => a.value - b.value);
sort array of integers
arrIntegers.sort((a,b) => a.value - b.value);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
sort array of date property inside objects
sort array of integers

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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Windows

View result in a separate tab

Test name	Executions per second
sort array of date property inside objects	25.6 Ops/sec
sort array of integers	410.4 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 test case and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark measures the performance of `Array.prototype.sort()` on two different scenarios:

1. Sorting an array of objects with a date property (`arrObjects`).
2. Sorting an array of integers (`arrIntegers`).

**Script Preparation Code**

The script prepares two arrays: `arrObjects` and `arrIntegers`. `arrObjects` contains 100,000 objects with a random date property, while `arrIntegers` contains 100,000 integers.

**Html Preparation Code**

There is no HTML preparation code provided, which means the benchmark doesn't test any web-specific scenarios.

**Individual Test Cases**

The benchmark consists of two individual test cases:

1. **sort array of date property inside objects**: The benchmark measures the time it takes to sort `arrObjects` using the custom sorting function `(a, b) => a.value - b.value`.
2. **sort array of integers**: The benchmark measures the time it takes to sort `arrIntegers` using the same custom sorting function.

**Libraries and Special Features**

There are no libraries used in this benchmark. However, the use of an arrow function (`(a, b) => a.value - b.value`) is noteworthy. This syntax is introduced in ECMAScript 2015 (ES6) and allows for concise, expressive function definitions.

**Pros and Cons**

The two approaches differ in their performance:

* **Sorting array of integers**: This approach should be faster since integer comparisons are generally faster than date comparisons.
	+ Pros: Faster execution time due to the simplicity of integer comparisons.
	+ Cons: May not accurately represent real-world scenarios where dates are involved.
* **Sorting array of date property inside objects**: This approach is more representative of real-world scenarios, but may be slower due to the complexity of date comparisons.
	+ Pros: More accurate representation of real-world scenarios where dates are involved.
	+ Cons: Potential for slower execution time.

**Other Alternatives**

If this benchmark were part of a larger suite, other alternatives might include:

* Using a different sorting algorithm (e.g., quicksort, mergesort)
* Testing with different array sizes or distribution patterns
* Including additional test cases that cover edge cases (e.g., sorting arrays with duplicates)

Overall, the benchmark provides valuable insights into the performance characteristics of `Array.prototype.sort()` under different scenarios.

Related benchmarks:

Array.prototype.sort (objects vs integers) (version: 0)

Comparing sort on date property inside object vs sort array of integers

Comparing performance of: sort array of date property inside objects vs sort array of integers

Created: 5 years ago by: Registered User

Jump to the latest result

sort array of date property inside objects

sort array of integers

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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