Using a section of several [vibraphone~] objects from the percolate-lib, PD eats all my cpu, pushing it above 90%, and destroying sound. The machine is a Dell 5150, with 2.8GHz cpu.
my first thought would be that it's a denormal issue ...
you could try to recompile percolate with -mfpmath=sse -msse in your cflags. and try to use the devel_ branch of pd, since it switches on the sse2 flag for treating denormals as zero (by hardware) ...
second, you can try to profile your patch to figure out, what is eating your cpu ... (switch~ of the vibraphone~s)
third, look at the percolate code and try to fix it ;-)
cheers ... tim