I have a patch that loads two new images every frame with two pix_image]--[pix_texture]. Only the latest two images are needed for each frame. I'm also using pix_image "thread 0" so that the images are loaded before the current frame is displayed, and pix_texture "rectangle 0, quality 2".
After some time Pd is using all my memory (I have 8GB ram and no swap) and the system becomes unresponsive.
Using valgrind I see there is a severe leak, probably in Magick loader (log attached). Same problem whether I use png or tif.
Pd version 0.42-6
compiled 08:43:13 Mar 19 2012
GEM: ver: 0.93.git 867c5a7
GEM: compiled: Mar 26 2013
*** 8:184.108.40.206-5 0
500 http://ftp.uk.debian.org/debian/ wheezy/main amd64 Packages