Tom Lane wrote: > Bruce Momjian <[EMAIL PROTECTED]> writes: > > Tom Lane wrote: > >> with -ffast-math gcc will "improve" it to > >> > >> int hour = time * 0.000277777777777778; > > > Hard to imagine why anyone would want such an optimization. How much > > faster could it possibly be? > > Back in ye bad olde days, there was probably an order-of-magnitude > difference between the speed of a float multiply and that of a float > divide; so this used to be a pretty standard sort of optimization. > I can remember doing the equivalent thing by hand in source code. > > On modern hardware I doubt it makes much difference...
And you would have to do a heck of a lot of them to see a difference. -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org
