Re: [HACKERS] Re: alloca (was: Postgres Speed or lack thereof)
Bruce Momjian <maillist@candle.pha.pa.us>
From: Bruce Momjian <maillist@candle.pha.pa.us>
To: scrappy@hub.org (The Hermit Hacker)
Cc: goran@kirra.net, tgl@sss.pgh.pa.us, vadim@krs.ru, pgsql-hackers@postgreSQL.org
Date: 1999-01-25T06:10:49Z
Lists: pgsql-hackers
> On Sun, 24 Jan 1999, Goran Thyni wrote: > > > The Hermit Hacker wrote: > > > BUGS > > > The alloca() function is machine dependent; its use is discouraged. > > > > Gain a big potential speed boost, loose some portability. > > I think most modern unices has a good alloca, DOS and Mac > > don't, but who's porting the server there? > > > > Any unices out there missing alloca? > > Make you a deal... > > You build the code such that "#ifdef HAVE_ALLOCA" is true, so that those > platforms that either don't support it, or have broken suport for it, > aren't affect, and you are most welcome to work on it... As far as I know, alloca is only useful for memory that is used by the current function or its children. I don't think we have many cases where we could use that. -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026