Re: MemoryContext reset/delete callbacks

On Thu, Feb 26, 2015 at 9:34 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Andres Freund <andres(at)2ndquadrant(dot)com> writes:
>> It's a bit sad to push AllocSetContextData onto four cachelines from the
>> current three... That stuff is hot. But I don't really see a way around
>> it right now. And it seems like it'd give us more amunition to improve
>> things than the small loss of speed it implies.
>
> Meh. I doubt it would make any difference, especially seeing that the
> struct isn't going to be aligned on any special boundary.

It might not make much difference, but I think avoiding unnecessary
padding space inside frequently-used data structures is probably a
smart idea.

--
Robert Haas
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