To estimate the costs of shared PMCs I have run this program[1], once with .Ref and once with .SharedRef.
There are 2 major issues:
1) PMC initialization (new_p_ic_p): The shared PMC needs additionally the allocation of the synchronize structure and the MUTEX_INIT.
This is a one-time cost. If a PMC has one, it should stick around after the PMC is destroyed and put on the free list.
2) PMC access (set_p_i): locking/unlocking the mutex with SharedRef 905 set_p_i 100000 0.049269 0.0005
with Ref 905 set_p_i 100000 0.011356 0.0001
Yeah, that's about right. There is, unfortunately, little to be done about it. -- Dan
--------------------------------------"it's like this"-------------------
Dan Sugalski even samurai
[EMAIL PROTECTED] have teddy bears and even
teddy bears get drunk
