I wrote:
I saw some discussion today that the :raw pseudo-layer in the open()
call will also remove the buffering layer (it doesn’t do that when you
use it in a binmode() call). I’ll try to remember to send a followup
once I actually understand what is going on.
That seems indeed to be the case right now. The bug is filed here:
http://rt.perl.org/rt3//Public/Bug/Display.html?id=80764
A workaround is to use ":raw:perlio" instead of ":raw" to turn to
binmode without losing the buffering.
Cheers,
-Jan