Re: profiling connection overhead

Greg Stark <gsstark@mit.edu> writes:
> On Mon, Nov 29, 2010 at 12:33 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Another question that would be worth asking here is whether the
>> hand-baked MemSet macro still outruns memset on modern architectures.
>> I think it's been quite a few years since that was last tested.

> I know glibc has some sexy memset macros for cases where the size is a
> constant. I'm not sure there's been much of an advance in the general
> case though. This would tend to imply we should consider going the
> other direction of having the caller of palloc0 do the zeroing
> instead. Or making palloc0 a macro which expands to include calling
> memset with the parameter inlined.

Well, that was exactly the reason why we did it the way we do it.
However, I think it's probably only node allocations where the size
is likely to be constant and hence result in a win.  Perhaps we should
implement makeNode() differently from the general case.

			regards, tom lane