Benchmark: Float32Array Vec3 init

HTML Preparation code:

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Script Preparation code:

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async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

Array
var a = new Float32Array([1,2,3]);
No Array
var a = new Float32Array(3); a[0] = 1; a[1] = 2; a[2] = 3;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array
No Array

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Test name	Executions per second
Array	4626818.5 Ops/sec
No Array	30605440.0 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated one year ago):

LLMs can make mistakes. Check important info.

The benchmark defined in the provided JSON is centered around the initialization of `Float32Array` in JavaScript, specifically comparing two different ways of initializing and populating this typed array: using an inline array versus manual assignment.

### Options Compared

1. **Initialization using an inline Array**:
   ```javascript
   var a = new Float32Array([1,2,3]);
   ```
   - **Test Name**: Array
   - This approach initializes a `Float32Array` with an array literal, where values are provided directly in an array format. This method is straightforward and can be perceived as more readable.

2. **Initialization without an inline Array**:
   ```javascript
   var a = new Float32Array(3);
   a[0] = 1;
   a[1] = 2;
   a[2] = 3;
   ```
   - **Test Name**: No Array
   - In this case, a `Float32Array` is created with a specified length (3), and its values are assigned manually in subsequent statements. This method offers granular control over each element but may be viewed as slightly less convenient.

### Performance Analysis

The benchmark results reveal how each method performs in terms of execution speed, measured in "Executions Per Second". The performance outcomes are as follows:

- **No Array**: 27,135,936.0 Executions Per Second
- **Array**: 9,333,970.0 Executions Per Second

### Pros and Cons of Each Approach

#### Inline Array Initialization (Array)
- **Pros**:
  - Simplicity and readability are enhanced; the intention of defining values at the time of initialization is clear.
  - The syntax is concise, allowing for quick setup.
  
- **Cons**:
  - Can be slower than manual initialization due to the overhead of creating an intermediate array.
  
#### Manual Assignment (No Array)
- **Pros**:
  - High performance due to reduced overhead; allocation is direct without an intermediate structure.
  - Flexibility in how elements are populated. For example, values could be conditioned or computed within loops before being assigned.
  
- **Cons**:
  - More verbose and can lead to decreased readability, especially with longer data sets.
  - Increased risk of errors if wrong indices are used during assignments.

### Library and Features

In this benchmark, no external libraries are tested, nor is there any unique JS feature or syntax that is leveraged beyond standard ECMAScript capabilities.

### Other Alternatives

Alternative approaches to initializing an array in JavaScript might include:

1. **Array.from**:
   ```javascript
   var a = Float32Array.from([1, 2, 3]);
   ```
   - A method that creates a new typed array from an existing iterable or array-like object.
   
2. **Spread Operator**:
   ```javascript
   var arr = [1, 2, 3];
   var a = new Float32Array(...arr);
   ```
   - This utilizes the spread operator to unpack an array into the `Float32Array`. While this is similar to the inline method, it can offer more flexibility with dynamic arrays.

3. **Using a Loop**:
   ```javascript
   var a = new Float32Array(3);
   for (let i = 0; i < a.length; i++) {
       a[i] = i + 1; // Assign values dynamically
   }
   ```
   - This allows for more complex initialization logic, such as computations or conditionally setting values.

### Conclusion

This benchmark serves to highlight the trade-offs between readability and raw performance when deciding how to initialize typed arrays in JavaScript. Depending on application needs—whether prioritizing performance or code clarity—developers can choose the most suitable approach. The provided alternatives also offer additional flexibility for various coding scenarios.

Related benchmarks:

Float32Array Vec3 init (version: 1)

Comparing performance of: Array vs No Array

Created: one year ago by: Guest

Jump to the latest result

Array

No Array

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated one year ago):