Async await/Coroutines aren't good for my IO case

So I'm making an application with Unity where a

SerialPort 

is connected to the PC and through which I need 60Hz updates (or close) information(around 200bytes or less) and another IO device(camera). I used

Coroutines 

and also

Async 

await to deal with this input but when I run the IO in Unity (with keyboard) I get a huge FPS drop.
Now if I use

SerialPort.BaseStream.ReadAsync

there isn't an FPS drop, but the information will be slowly received.
My question would be : Did anyone get into this kind of issue ? Any suggestions ? also do you think I should turn to Threads ?

 

Coroutines run on the main thread. An async method runs on the main thread until it calls await. What you might want is to run this entirely in a separate thread instead of on the main thread.

 

Thanks for the answer @Joe-Censored ! Do you mean run all the content of the async method in a background thread ?

 

Yeah, I'd be considering starting a new thread, do all serial port work in that new thread, and sync it with the main thread with something like a ConcurrentQueue. That's what I do for my networking implementation, and I'd think the same approach may be appropriate for this kind of thing.