RustTokioBenchmark VS windows-rs

> If you ever pull up a debugger and step through an async Rust/tokio codebase, you'll get a good sense for what the overhead here we're talking about is.

So I didn't quite do that, but the overhead was interesting to me anyway, and as I was unable to find existing benchmarks (surely they exist?), I instructed computer to create one for me: https://github.com/eras/RustTokioBenchmark

On this wee laptop the numbers are 532 vs 6381 cpu cycles when sending a message (one way) from one async thread to another (tokio) or one kernel thread to another (std::mpsc), when limited to one CPU. (It's limited to one CPU as rdtscp numbers are not comparable between different CPUs; I suppose pinning both threads to their own CPUs and actually measuring end-to-end delay would solve that, but this is what I have now.)

So this was eye-opening to me, as I expected tokio to be even faster! But still, it's 10x as fast as the thread-based method.. Straight up callback would still be a lot faster, of course, but it will affect the way you structure your code.

Improvements to methodology accepted via pull requests :).

I'd say Rust does have that big ticket ecosystem push. Microsoft has been embracing Rust lately, with things like official Windows bindings [1].

The bigger problem is just inertia: large game engines are enormous.

[1]: https://github.com/microsoft/windows-rs

It's a shame that, unlike with Win32, using WinUI places pretty harsh restrictions on which programming languages and environments you can use. Only C# and C++ are supported, the latter only with Microsoft compilers. For everything else, including Rust[1], Python and MinGW C/C++, there is no answer for OP's question, and the effect of this on the visual consistency of the Windows desktop is obvious - there is none. Every third-party app uses a different toolkit with a different look and feel, because the library providing the standard look and feel simply isn't available to the majority of developers.

[1]: https://github.com/microsoft/windows-rs/pull/1836

[0] https://github.com/microsoft/windows-rs

On Windows you'd need to call the LoadLibraryEx method. You'd also need a crate to call Win32 functions, I suggest windows-rs.

windows-rs, Microsoft's crate wrapping the Windows API, already includes the WDK, the special sdk for creating kernel code.

On windows, I'll probably use https://github.com/gabdube/native-windows-gui or https://github.com/microsoft/windows-rs both of them seem pretty solid.

*nod* It's an official Microsoft thing generated from official Microsoft API definition files. (The repo is at microsoft/windows-rs on GitHub.)

Microsoft offers official "bindings" to Win32 APIs through win32metadata. However, until recently, it did not include metadata for kernel-level functions or WDK. In early 2021, an issue was raised through windows-rs regarding this limitation, but progress was slow until now. Microsoft has finally released official metadata for WDK, which can be found on the wdkmetadata repository. The latest comment on the issue thread can be found here:

Is something wrong with https://github.com/deviceplug/btleplug or you haven't found it? You could also use bindings to platform libraries like https://github.com/microsoft/windows-rs and https://github.com/rust-mobile/ndk if btleplug doesn't have something fundamental to you.