[patch] mem_node shrink #2

[Dmitry Antipov]

This is a second attempt with struct mem_node shrink stuff. It also touches 
xrealloc due to the reasons described at 
http://lists.gnu.org/archive/html/emacs-devel/2007-11/msg01583.html.



On 64-bit system with glibc malloc, the benefits are even more - for 48-bytes 
mem_node, 56-bytes chunk is allocated in the best (normal) case, and 72-bytes 
chunk is allocated rarely. This patch reduces mem_node to 40 bytes, which is an 
exact allocation size in the most of the cases (rare worst cases are 56-bytes 
chunks). That's for the case if GC_MALLOC_CHECK isn't defined, of course.



Dmitry

mem_node_shrink_2.patch
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