| From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
|---|---|
| To: | Neil Conway <nconway(at)klamath(dot)dyndns(dot)org> |
| Cc: | Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: compile bug in HEAD? |
| Date: | 2002-03-31 03:29:13 |
| Message-ID: | Pine.LNX.4.30.0203302216170.683-100000@peter.localdomain |
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| Thread: | |
| Lists: | pgsql-hackers |
Neil Conway writes:
> However, it does appear that we can tweak flex for more performance
> (usually at the expense of a larger generated parser). In particular, it
> looks like we could use "-Cf" or "-CF". Is this a good idea?
Probably. Run some performance tests if you like. It looks like -CFea
might be a reasonable candidate.
> While we're on the subject of minor optimizations, is there a reason why
> we execute gcc with "-O2" rather than "-O3" during compilation?
Mainly because everyone does it this way. Probably because it's a
reasonable compromise between execution speed, compilation speed,
debuggability, and compiler bugs.
--
Peter Eisentraut peter_e(at)gmx(dot)net
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