Benchmark: Create Object vs Map vs Array vs Set

Tests:

Create Object
var obj = {"one": true, "two": true, "three": true, "four": true, "five": true, "six": true, "seven": true, "eight": true, "nine": true, "ten": true};
Create Map
var map = new Map([["one", true], ["two", true], ["three", true], ["four", true], ["five", true], ["six", true], ["seven", true], ["eight", true], ["nine", true], ["ten", true]]);
Create Array
var arr = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten"];
Create Set
var set = new Set(["one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten"]);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Create Object
Create Map
Create Array
Create Set

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the benchmark and its various components.

**Benchmark Definition**

The provided JSON represents a JavaScript microbenchmarking test case. The test is designed to compare the performance of creating different data structures: objects, maps, arrays, and sets.

**Data Structure Creation Options**

The four options being compared are:

1. **Objects**: Creating an object using the `var obj = { ... };` syntax.
2. **Maps**: Creating a map using the `var map = new Map([ ... ]);` syntax.
3. **Arrays**: Creating an array using the `var arr = [ ... ];` syntax.
4. **Sets**: Creating a set using the `var set = new Set([ ... ]);` syntax.

**Pros and Cons of Each Approach**

Here's a brief summary of each approach:

*   **Objects**: This method is often used for simple key-value pair data structures. However, it can be slower than other methods because objects are hash tables that require extra memory to store the keys.
*   **Maps**: Maps provide faster lookups compared to objects because they use hash tables internally. They also provide a more flexible data structure for storing key-value pairs. However, creating a map involves more code and may incur additional overhead due to the `Map` constructor and iteration over the entries.
*   **Arrays**: Arrays are generally faster than objects when it comes to simple, contiguous data structures. However, they require explicit looping or using array methods like `forEach()` to access elements, which can be slower than object property lookups.
*   **Sets**: Sets provide fast membership testing and insertion operations compared to arrays. They also eliminate duplicates automatically. However, creating a set involves more code due to the `Set` constructor and iteration over the elements.

**Library Use**

There is no explicit library being used in these tests. The test cases are focused on comparing the performance of different data structure creation methods using only standard JavaScript constructs.

**Special JavaScript Features/Syntax**

None of the provided benchmark cases use any special JavaScript features or syntax that would affect their execution. They are straightforward examples of creating common data structures.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are a few options:

*   **Typed Arrays**: Instead of using vanilla arrays, you could use typed arrays like `Uint8Array`, `Int32Array`, etc., which provide faster access to specific types of data.
*   **Weak Maps and Weak Sets**: These are specialized maps and sets that allow garbage collection to occur while iterating over the entries. They might be useful in certain scenarios but have different performance characteristics compared to their standard counterparts.
*   **Native Array and Set methods**: Some modern browsers provide native methods like `Array.prototype.map()` and `Set.prototype.forEach()`, which can offer better performance than using JavaScript's built-in array and set constructors.

Here is a sample JavaScript code snippet that demonstrates how to create these data structures in a real-world scenario:

```javascript
// Create an object
const obj = {
    name: 'John Doe',
    age: 30,
};

// Create a map
const map = new Map([
    ['name', 'Jane Doe'],
    ['age', 25],
]);

// Create an array
const arr = [1, 2, 3, 4, 5];

// Create a set
const set = new Set([1, 2, 3, 4, 5]);
```

Feel free to ask if you need further clarification!

Related benchmarks:

Create Object vs Map vs Array vs Set (version: 2)

Comparing performance of: Create Object vs Create Map vs Create Array vs Create Set

Created: 5 years ago by: Registered User

Jump to the latest result

Create Object

Create Map

Create Array

Create 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):