Re: Start a Windows process and get its text output

["Hibou57 (Yannick Duchêne)" <yannick_duchene@yahoo.fr>]

On 7 fév, 20:24, Hibou57 (Yannick Duchêne) <yannick_duch...@yahoo.fr>
wrote:
> I was wondering about the cost of threads on Windows, as GNAT create
> Ada task as Windows thread (I suppose its the same for Janus and
> others, I hope to be honest).
> [...]
>
> The sole words about it in the MS reference says :
For any interested parties, I've found an answer which seems
reasonable here :
http://stackoverflow.com/questions/304752/how-to-estimate-the-thread-context-switching-overhead

Two interesting quotes are:

> Oh, and I remember an application running on Windows CE 4.X, where
> we also have four threads with intensive switching at times, and
> never ran into performance issues.

and

> Output
> Number of thread switches in about one second was 108406
> Over 100'000 is not too bad and that even though we have locking and
> conditional waits. I'd guess without all this stuff at least twice
> as many thread switches were possible a second.

Threads does not cost so much after all (keep in mind this was on
architecture with support for Windows, this is Windows specific).