| From: | Douglas McNaught <doug(at)mcnaught(dot)org> |
|---|---|
| To: | CSN <cool_screen_name90001(at)yahoo(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: How much slower are numerics? |
| Date: | 2005-10-21 23:01:08 |
| Message-ID: | m2y84mqxu3.fsf@Douglas-McNaughts-Powerbook.local |
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| Lists: | pgsql-general |
CSN <cool_screen_name90001(at)yahoo(dot)com> writes:
> Another thing I've always wondered about ;), as I use
> numerics far more than floats. From the docs:
>
> "However, arithmetic on numeric values is very slow
> compared to the integer types, or to the
> floating-point types"
>
> How much slower are numerics? And why (I guess it has
> to do with potentially different sizes)?
Integer and floating-point arithmetic are done in hardware. NUMERIC
is done in software, and is variable size (as you note). I would
guess that the difference in speed is at least an order of magnitude.
-Doug
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