After digging through obmalloc.c to optimize some memory intensive code, I put a paper together on the entire private memory heap that may or may not be a useful addition to docs. I was hoping someone could review/proof it for errors in content. Not sure the policy on links but I've uploaded it to google drive: https://drive.google.com/open?id=0B6IkX5KnPHVLamwxSTNYR3dJYkE thanks, jon