Benchmark: array includes vs object key lookup vs Set.has

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var b = { 1: {}, 2: {}, 3: {}, 4: {}, 5: {}, 6: {}, 7: {}, 8: {}, 9: {}, 10: {} };
var c = new Set(a);

Tests:

includes
return a.includes(9)
lookup
return b[9]
set
return c.has(9)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
includes
lookup
set

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 JSON data and explain what each component is testing, along with the pros and cons of different approaches.

**Benchmark Definition**

The benchmark definition json represents three test cases:

1. `array includes vs object key lookup vs Set.has`
2. `includes` (individual test case)
3. `lookup` (individual test case)
4. `set` (individual test case)

These test cases aim to measure the performance difference between using the `includes()` method, accessing an element by its index in an array (`b[9]`) and a Set data structure (`c.has(9)`).

**Script Preparation Code**

The script preparation code is used to set up the environment for each test case:

```javascript
var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var b = { 1: {}, 2: {}, 3: {}, 4: {}, 5: {}, 6: {}, 7: {}, 8: {}, 9: {}, 10: {} };
var c = new Set(a);
```

This code creates an array `a`, an object `b` with indices from 1 to 10, and a Set `c` containing the elements of `a`. These data structures will be used in each test case.

**Individual Test Cases**

Each individual test case has its own benchmark definition:

* `includes`: measures the performance of using the `includes()` method on an array.
* `lookup`: measures the performance of accessing an element by its index in an object.
* `set`: measures the performance of using a Set data structure to check for membership.

**Library and Syntax**

In this benchmark, the following libraries and syntax are used:

* The `Set` data structure is used as part of the JavaScript standard library. A Set is an unordered collection of unique values, which provides efficient membership testing.
* No other libraries or frameworks are mentioned in the provided JSON data.

**Special JS Features or Syntax**

None of the test cases use special JavaScript features or syntax. The benchmark only uses standard JavaScript methods and data structures.

**Alternatives**

Other alternatives for these types of benchmarks might include:

* Using different data structures, such as linked lists or binary search trees.
* Implementing custom algorithms for membership testing in sets, arrays, and objects.
* Testing performance using other programming languages or frameworks.

Some possible variations on this benchmark could include:

* Adding more elements to the data structures to increase the number of iterations.
* Using a larger array or object to reduce the memory access overhead.
* Introducing noise or errors into the data structures to simulate real-world scenarios.
* Measuring performance in a different context, such as concurrent execution or parallel processing.

Related benchmarks:

array includes vs object key lookup vs Set.has (version: 0)

Comparing performance of: includes vs lookup vs set

Created: 2 years ago by: Guest

Jump to the latest result

includes

lookup

set

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):