Peter Hansen <[EMAIL PROTECTED]> wrote: > B. Don't bother trying, because even if the MTU is large enough there is > absolutely no guarantee that the packet will stay intact all the way > through the network anyway (even if you use sendall() instead of send()).
This is true, but I'm generating the message being sent in very small chunks (often as small as 4 bytes at a time), and typically need to flush a packet out onto the network after a few dozen bytes. Maybe at most a few hundred. I don't know of any networks with MTU's smaller than that. Measurements show a 10-fold improvement in protocol throughput with large packets vs. small ones. The only question is what's the most efficient way in Python to generate the large packets. > So fixing your design not to require this appears to be the only viable > solution. My design is not broken. I'm writing code to drive a pre-existing binary communications protocol. It is what it is. The functionality I seek exists at the Unix system call level (writev, sendmsg), but doesn't appear to be exposed in the Python socket API. -- http://mail.python.org/mailman/listinfo/python-list
