Benchmark: ~ Hashmap vs Array.Filter 9

Script Preparation code:

const counter = 10
const map = new Map()
const array = new Array(counter)

window.counter = counter
window.map = map
window.array = array
for (let i = 0; i < counter; i++) {
    map.set(i)
    array[counter] = i
}

Tests:

Hashmap
for (let i = 0; i < 20000; i++) { window.map.has(9) }
Array.filter
for (let i = 0; i < 20000; i++) { window.array.filter((value) => value === 9) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Hashmap
Array.filter

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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 definition is a JSON object that contains information about the test case. In this case, there are two test cases:

* "Hashmap vs Array.Filter 9"
* The description of the benchmark is empty, which means it doesn't provide any additional context or purpose.
* The script preparation code is used to set up variables and data for the test case:
	+ `const counter = 10`: sets a constant variable `counter` with value `10`.
	+ `const map = new Map()`: creates an empty Map object called `map`.
	+ `const array = new Array(counter)`: creates an empty array called `array` with size equal to the `counter` variable.
* The HTML preparation code is empty, which means no HTML-specific setup is required.

**Individual Test Cases:**

There are two test cases:

1. "Hashmap"
2. "Array.filter"

Each test case has a benchmark definition that specifies the JavaScript code to be executed. In this case, both test cases have the same loop structure:

* `for (let i = 0; i < counter; i++) { ... }`
* The body of the loop is where the actual testing happens.

**Test Case 1: "Hashmap"**

The benchmark definition for the "Hashmap" test case is:
```javascript
for (let i = 0; i < 20000; i++) {
    window.map.has(9)
}
```
This code repeatedly checks if `9` is a key in the `window.map` object. The `has()` method is used to check if an element exists in the map.

**Test Case 2: "Array.filter"**

The benchmark definition for the "Array.filter" test case is:
```javascript
for (let i = 0; i < 20000; i++) {
    window.array.filter((value) => value === 9)
}
```
This code repeatedly applies the `filter()` method to the `window.array` array, filtering out elements that are not equal to `9`. The callback function `(value) => value === 9` is used as a predicate to determine which elements to keep.

**Comparison of Options:**

The two test cases are comparing two different approaches:

* `Hashmap`: uses the `has()` method on a Map object to check for key existence.
* `Array.filter`: uses the `filter()` method on an array to filter out elements that don't match a condition.

Pros and Cons:

* **`Hashmap`**:
	+ Pros:
		- Fast lookups ( O(1) average case)
		- Efficient memory usage
	+ Cons:
		- Not suitable for exact matching (e.g., checking if an element exists in the map)
* **Array.filter**:
	+ Pros:
		- Simple and concise syntax
		- Can be used with arrays of any data type
	+ Cons:
		- Slower than `has()` method for large datasets
		- More memory-intensive due to creating a new array

Other Considerations:

* **Library usage**: Neither test case uses a library. However, if the benchmark were modified to use a library like Lodash, it would likely introduce additional dependencies and complexity.
* **Special JS feature or syntax**: This benchmark does not use any special JavaScript features or syntax.

**Alternatives:**

If you wanted to modify this benchmark to explore alternative approaches, here are some ideas:

* Compare the performance of `Array.from()` with a loop-based approach.
* Test the performance of using `Set` instead of `Map`.
* Explore the use of WebAssembly (WASM) or other JIT compilers to optimize the code.

Keep in mind that each alternative would require significant changes to the benchmark definition and setup.

Related benchmarks:

~ Hashmap vs Array.Filter 9 (version: 0)

Comparing performance of: Hashmap vs Array.filter

Created: 3 years ago by: Guest

Jump to the latest result

Hashmap

Array.filter

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):