Re: Efficient output for integer types

> 15 сент. 2019 г., в 12:18, David Fetter <david(at)fetter(dot)org> написал(а):
>
> Please find attached a couple of patches intended to $subject.
>
> This patch set cut the time to copy ten million rows of randomly sized
> int8s (10 of them) by about a third, so at least for that case, it's
> pretty decent.

Hi! Looks cool.

Just curious if for any fixed base and square here

+ while(uvalue >= base)
{
+ const int i = (uvalue % square) * 2;
+ uvalue /= square;
+ vallen += 2;
+ memcpy(convert + sizeof(convert) - vallen, digits + i, 2);
+ }

compiler will have a chance to avoid idiv instruction?
Maybe few specialized functions could work better than generic algorithm?

Best regards, Andrey Borodin.