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A comment on Yay! Hacker News is on a new and improved server now.. Parent comment

Re:Yay! Hacker News is on a new and improved server now. by cperciva on Saturday March 14, 2009 @04:58PM (#516170)
I'd guess that most of the memory is used by blocks of text which are much larger than the pointers which reference them, so probably the size_t expansion has a minimal impact on the total memory usage.
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Re:Yay! Hacker News is on a new and improved server now. by jwilliams on Saturday March 14, 2009 @05:12PM (#516176)
That's true, but 64 bit will affect other things as well - pointer size goes up, your stack will be bigger and the packing (alignment) of your structures changes.

If your compiler is unfriendly, your structure size can change significantly -- afaik, GCC is pretty clever about structure packing, but I'd imagine it varies a lot depending on the architecture.

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