mal> pystone is *not* your typical Python application. If you want some mal> interesting data, I'd suggest to use applications like Zope, PySol, mal> Mailman, etc. as basis. Let me mention once again that I have an XML-RPC server available to which applications can connect and upload their dynamic opcode frequencies. This can be done more-or-less transparently using the atexit module. Others can then fetch aggregate information for use like Damien's. It's running at dxp = xmlrpclib.ServerProxy("http://manatee.mojam.com:7304") To get a usage message, execute print dxp.usage() I've run it for the past couple months, since my last announcement here and in c.l.py but have yet to pick up any data. I'm going to take a dose of my own medicine and start running Python on my development machine with DYNAMIC_EXCUTION_PROFILE and DXPAIRS defined and modify my interactive setup and a couple applications I run frequently to dump their instruction counts. Skip