Re: COPY speedup

Pierre Frédéric Caillaud <lists@peufeu.com> writes:
> I've been examining the code path for COPY FROM too, and I think it is
> possible to get the same kind of speedups on COPY FROM that the patch in
> the previous message did for COPY TO, that is to say perhaps 2-3x faster
> in BINARY mode and 10-20% faster in TEXT mode (these figures are
> ballparks, only based on very quick checks however).

> The idea is to avoid most (actually, all) palloc()'ing and memcpy()'ing
> for types that are pass-by-value like INT.

> Is there interest in such a patch (for 8.6) ?

If you do as much damage to the I/O function API as the other patch
did, it will probably be rejected.  We don't touch datatype APIs
lightly, because it affects too much code.
        regards, tom lane