Benchmark: Unique array Set vs Object

Tests:

Set
var fooSet = new Set(); for(var i=0;i<2000;i++) { fooSet.add(i % 20); } var other = [...fooSet];
Object
var fooObj = {} for(var i=0;i<2000;i++) { fooObj[i] = i } var other = Object.values(fooObj)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Set
Object

Fastest: N/A

Slowest: N/A

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

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Let's break down the provided benchmark and its test cases.

**Benchmark Overview**

The benchmark is designed to compare the performance of two approaches: using an array set (a collection of unique values) versus an object with key-value pairs. The goal is to measure which approach is faster for large datasets.

**Test Cases**

There are two individual test cases:

1. **Set**: This test case creates a new Set instance and adds 2000 elements, where each element is calculated as `i % 20` (a hash-like operation). Then, it extracts the values from the set using the spread operator (`...`). The purpose of this test case is to measure the performance of iterating over a unique collection.
2. **Object**: This test case creates an empty object and adds 2000 key-value pairs, where each value is the result of `i`. Then, it extracts the values from the object using the `Object.values()` method. The purpose of this test case is to measure the performance of iterating over a collection with keys.

**Comparison**

The benchmark compares two approaches:

* **Array Set**: Using an array set (`Set`) allows for efficient storage and lookup of unique elements, which can lead to faster iteration.
* **Object**: Using an object requires more memory and processing power to store key-value pairs, but provides a flexible data structure that can be used in various scenarios.

**Pros and Cons**

**Array Set:**

Pros:

* Efficient storage and lookup of unique elements
* Fast iteration using the spread operator (`...`)

Cons:

* May require additional memory allocation for the set
* Not suitable for scenarios where order matters (e.g., arrays)

**Object:**

Pros:

* Flexible data structure that can be used in various scenarios
* Supports ordered key-value pairs

Cons:

* More memory-intensive due to storing key-value pairs
* Slower iteration using `Object.values()` compared to array sets

**Library and Special JS Features**

The test cases use the following library:

* None (no external libraries are required)

However, the benchmark uses special JavaScript features:

* The spread operator (`...`) is used to extract values from a set.
* Object destructuring is implied in the `Object.values()` method, although not explicitly shown.

**Other Alternatives**

Alternative approaches for iterating over collections include:

* **For loops**: Using traditional for loops with array indices can be slower than array sets or objects.
* **Array.map()**: Using `array.map()` to iterate over an array can be slower than using array sets due to the overhead of function calls and intermediate results.

However, these alternatives are not part of the benchmarked test cases.

Related benchmarks:

Unique array Set vs Object (version: 0)

Comparing performance of: Set vs Object

Created: 3 years ago by: Guest

Jump to the latest result

Set

Object

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):