Re: tweaking MemSet() performance - 7.4.5

Manfred Spraul <manfred@colorfullife.com> writes:
> That's the price you pay for weakly ordered memory access.
> Linux on ppc uses eieio, on ppc64 lwsync is used. Could you check if 
> they are faster?

I recall looking at lwsync and being concerned about portability
problems --- older assemblers will fail to recognize it.  I'd want
to see some hard evidence that changing sync to lwsync would be a
significant performance win before taking any portability risk here.
        regards, tom lane