On Jan 22, 11:11 am, Robin Becker <ro...@reportlab.com> wrote: > Does using the decimal module incur a penalty because it imports threading or > do > I have to actually start a thread?
There is at least one threading-related performance penalty that doesn't involve the user actually starting a thread: any arithmetic operation without an explicitly specified context (e.g., as invoked by one of the standard arithmetic operators) has to make a call to threading.local() to look up the current (thread-local) context. I don't know offhand whether this penalty is significant for the Python version of decimal, though it definitely *is* significant for decimal-in-C rewrite that's in the works: it would be interesting to do some timings against a thread-unaware version of decimal.py. -- Mark -- http://mail.python.org/mailman/listinfo/python-list
