Benchmark: dealing with array of array which array should come first?

Script Preparation code:

var fewElements = [];
var few = 100;
var moreElements = [];
var more = 10000;
var moreElementsIncluded = [];
for (var i = 0; i < few; i++) {
  fewElements.push(Math.floor(Math.random() * few**2));
}
for (var i = 0; i < more; i++) {
  moreElements.push(Math.floor(Math.random() * more**2) + few**2)
}
for (var i = 0; i < more; i++) {
  moreElementsIncluded.push(Math.floor(Math.random() * more**2))
}

Tests:

few over more
var tempResult = fewElements.some(e => moreElements.includes(e))
few over more included
var tempResult = fewElements.some(e => moreElementsIncluded.includes(e))
more over few
var tempResult = moreElements.some(e => fewElements.includes(e))
more over few included
var tempResult = moreElementsIncluded.some(e => fewElements.includes(e))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
few over more
few over more included
more over few
more over few included

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36

Browser/OS: Chrome 110 on Linux

View result in a separate tab

Test name	Executions per second
few over more	6856.6 Ops/sec
few over more included	12030.5 Ops/sec
more over few	569.7 Ops/sec
more over few included	1128.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared options, pros and cons of those approaches, and other considerations.

**Benchmark Definition**

The benchmark defines an array `fewElements` with 100 random elements, each squared, and another array `moreElements` with 10,000 random elements, some of which are the same as in `fewElements`. A third array `moreElementsIncluded` is created by copying the original elements from `moreElements`, but with additional random elements. The benchmark uses the `some()` method to check if each element in `fewElements` is included in either `moreElements` or `moreElementsIncluded`.

**Comparison Options**

The benchmark compares four different scenarios:

1. `few over more`: Checking if each element in `fewElements` is included in `moreElements`.
2. `few over more included`: Checking if each element in `fewElements` is included in both `moreElements` and `moreElementsIncluded`.
3. `more over few`: Checking if each element in `moreElements` is included in `fewElements`.
4. `more over few included`: Checking if each element in `moreElements` is included in both `fewElements` and `moreElementsIncluded`.

**Pros and Cons of Comparison Options**

* **Few over more**: This option checks for the existence of elements from one array (`fewElements`) in another array (`moreElements`). It's a simple approach, but it might be slow due to the large size of `moreElements`. Additionally, this approach assumes that the order of the arrays doesn't matter.
* **Few over more included**: This option checks for the existence of elements from one array (`fewElements`) in both `moreElements` and `moreElementsIncluded`, which includes additional random elements. This approach is similar to the previous one but provides a better estimate of the actual performance, as it's less dependent on the size of `moreElements`.
* **More over few**: Similar to the first option, but checks for the existence of elements from `moreElements` in `fewElements`. It's also a simple approach and might be slow due to the large size of `fewElements`.
* **More over few included**: This option checks for the existence of elements from `moreElements` in both `fewElements` and `moreElementsIncluded`, which includes additional random elements. Like the previous one, it provides a better estimate of the actual performance.

**Library Used: None**

The benchmark doesn't use any external libraries. The `some()` method is a built-in JavaScript function that's part of the language standard.

**Special JS Feature/ Syntax: Some() Method**

The benchmark uses the `some()` method, which is a modern JavaScript feature introduced in ECMAScript 2012 (ES6). This method returns `true` if at least one element in an array satisfies a provided test condition. It's a convenient way to check for existence or membership in arrays.

**Other Considerations**

* The benchmark creates large arrays with random elements, which can affect the performance of the code being tested.
* The benchmark uses a simple comparison approach, which might not accurately represent real-world scenarios where more complex logic is involved.
* The benchmark doesn't account for potential issues like array length limits or performance optimizations used by JavaScript engines.

**Alternatives**

If you were to create this benchmark from scratch, some alternatives could include:

1. Using the `includes()` method instead of `some()`, which provides a similar functionality but is more readable and concise.
2. Creating smaller arrays with fewer elements to reduce the impact of array size on performance.
3. Adding additional logic or complexity to the comparison tests to better represent real-world scenarios.
4. Using a different data structure, like an object or map, instead of arrays to change the way the benchmark tests performance.

Keep in mind that these alternatives would likely require significant changes to the benchmark definition and implementation.

Related benchmarks:

dealing with array of array which array should come first? (version: 1)

Comparing performance of: few over more vs few over more included vs more over few vs more over few included

Created: one year ago by: Registered User

Jump to the latest result

few over more

few over more included

more over few

more over few included

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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