receiveTimeout minimum reasonable timeout value?

[JR via Digitalmars-d-learn]

On Thursday, 15 May 2014 at 18:15:46 UTC, Charles Hixson via 
Digitalmars-d-learn wrote:
> Duration can be specified in nanoseconds, but does it make any 
> sense
> to have a value of 1 nanosecond?  0?
>
> My desire is to check whether a message is in the queue, and 
> then
> either move it local to the thread, or continue, depending.

I use 0.seconds for such oneshot receive attempts. Snippet:

     while (!halt) {
         if (++readCounter > messageCheckFrequency) {
             receiveTimeout(0.seconds,
                 &_verbose.fun,
                 &_quiet.fun,
                 &_unknown.fun
             );

             readCounter = 0;
         }

         slice = conn.stream.readLine(buf);
         // ...
     }