From: David Holroyd <ruby-talk@...>
Date: 2005-05-24T18:16:05+09:00
Subject: Re: UDP select()/recvfrom() delay under Windows?

On Tue, May 24, 2005 at 02:05:17PM +0900, Ville Mattila wrote:
> David Holroyd <ruby-talk@badgers-in-foil.co.uk> writes:
> > When I run my test code in ruby 1.8.2 (2004-12-25) [i386-mswin32], I
> > see, for example:
> >
> >
> > I notice that there is a gap of some several seconds between select()
> > completing, and recvfrom() completing -- I expected that, since select()
> > reports data can be read, recvfrom() should not block.  Am I wrong?
> 
>  I think this will be fixed in 1.8.3 so you could try it. There is a 1.8.3rc1
>  available at www.ruby-lang.org. You have to compile it your self though.

I don't have MSVC++, so I downloaded ruby-1.8.3-preview1-i386-mswin32.zip
from http://www.garbagecollect.jp/ruby/mswin32/en/download/release.html
and unpacked that over the top of the install directory created by
ruby182-15.exe.

Using ruby 1.8.3 (2005-05-12) [i386-mswin32], I still see recvfrom()
block for 4-5 seconds each time it's called.

Oddly, when I access the server off-site, using a tunnel, there's no
delay (i.e. when the Ruby program is configured to connect to the tunnel
endpoint on localhost, rather than directly to the server machine).


dave

-- 
http://david.holroyd.me.uk/