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Float32Array Vec3 init
(version: 1)
Comparing performance of:
Array vs No Array
Created:
one year ago
by:
Guest
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HTML Preparation code:
<!--your preparation HTML code goes here-->
Script Preparation code:
/*your preparation JavaScript code goes here To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/ 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>
Run tests (2)
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Test case name
Result
Array
No Array
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 15_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6.1 Mobile/15E148 Safari/604.1
Browser/OS:
Mobile Safari 15 on iOS 15.6.1
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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):
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.
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