Re: Can someone help me fill in missing info about Nim's 8 GC models?

[Araq]

Actually Nim helps Boehm by telling it about "pointer free" data that doesn't 
have to be scanned. Secondly, the fact that it's conservative scanning over 
lots of little objects where many words are pointers anyway (can be quite 
common in compilers ;-) ) can speed up the scanning process. Winning over Boehm 
isn't so easy on a 64 bit system.