Probably it has nothing to do with this object. I think there are some dark sides of Pure Data CPU usage.
Might be...
I observed another stange thing with readany, though: To load it for the first time, takes very long - much longer than all other libraries together. Does anyone know the reason for this? I suspect some memory allocation...
where do you have readanysf~ installed? maybe pd is looking for it.
otherwise, there is one internal buffer that gets allocated at the beginning. its 16*4*4096 = 262144 bytes large. quite large actually. this could come down to 64k and still be usefull I think. maybe even 32k. probably even best to make it variable according to init paramaters.
ill try and do some testing.
-august.