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Instantiation of ArrayBuffer vs Normal
(version: 0)
Benchmark.js
Comparing performance of:
Uint32 vs Normal vs Uint32Array
Created:
4 years ago
by:
Guest
Go to the latest result
Script Preparation code:
var last = 100000;
Tests:
Uint32
for (let i; i < last; i++) { const x = new ArrayBuffer(4); const y = new Uint32Array(x); y[0] = 16777215; }
Normal
for (let i; i < last; i++) { var y = 16777215; }
Uint32Array
const x = new ArrayBuffer(4 * last); const y = new Uint32Array(x); last = y.length; for (let i; i < last; i++) { y[0] = 16777215; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Uint32
Normal
Uint32Array
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
9 months ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:145.0) Gecko/20100101 Firefox/145.0
Browser/OS:
Firefox 145 on Linux
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=622946" width="100%" height="500px"></iframe>
Uint32
718.9M/s
Normal
674.1M/s
Uint32Array
20K/s
View exact numbers
Test name
Executions per second
✓
Uint32
718,903,168 Ops/sec
Normal
674,071,424 Ops/sec
Uint32Array
19,875 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the JavaScript microbenchmark provided by MeasureThat.net. **Benchmark Definition** The benchmark measures the performance of three approaches to create and use `Uint32` variables in JavaScript: 1. **Instantiation of ArrayBuffer vs Normal**: This test compares two approaches: * **Normal**: Creating a `Uint32` variable without allocating any memory. * **Instantiation of ArrayBuffer**: Allocating memory for an `ArrayBuffer` using the `new ArrayBuffer()` constructor, and then creating a `Uint32` view from that buffer. **Pros and Cons** * **Normal**: + Pros: Lightweight allocation with no overhead. + Cons: May be slower due to JavaScript's garbage collection mechanisms. * **Instantiation of ArrayBuffer**: + Pros: Allows for fine-grained control over memory allocation, which can lead to better performance in some cases. + Cons: Allocations and deallocations can introduce additional overhead. **Library and Purpose** None mentioned in the provided benchmark definition. However, it's worth noting that `Uint32Array` is a typed array implementation that provides a more efficient way of working with 32-bit unsigned integers compared to the traditional `Uint32` variable. The test cases use no special JavaScript features or syntax beyond what's standard in modern JavaScript. The use of `let i;` and `for (let i; i < last; i++)` is an example of a simple loop construct, which is a fundamental building block in many programming languages. **Other Alternatives** If you're interested in exploring alternative approaches to this benchmark, here are some options: 1. **Using typed arrays directly**: Instead of creating `Uint32Array` views from `ArrayBuffers`, you could create the array directly using `new Uint32Array()`. This might be slightly faster or more efficient. 2. **Using native WebAssembly modules**: If you're working with modern browsers, you could explore using WebAssembly (WASM) to compile your JavaScript code into a low-level binary format that can be executed by the browser's WASM runtime. This might provide significant performance benefits, but requires additional setup and expertise. 3. **Profile-guided optimization**: MeasureThat.net's benchmarking framework is designed to help you identify performance bottlenecks in your code. By using profiling tools like Chrome DevTools or Node.js built-in profiler, you can gain more insights into the performance characteristics of different approaches and optimize your code accordingly. Keep in mind that each alternative approach has its own trade-offs, complexity levels, and potential benefits. The choice ultimately depends on the specific requirements and constraints of your project.
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