> Lamar Owen wrote:
>
> >
> > Bruce Momjian wrote:
> > >
> > > Someone mentioned that it took them quite a while to compile the
> > > PostgreSQL code. My wallclock time is 3:52 for a compile with -O1 using
> > > gcc 2.7.2.1. This is on a dual-PII 350MHz running BSD/OS 4.01.
>
> Hmmm,
>
> Is there something wrong with your system, Bruce? My 64MB
> 333MHz singe-PII (same gcc version under Linux 2.2.10) does a
> -O1 clean-compile in 3:28.
>
> Maybe the SMP overhead is eating up the missing cycles. You
> would like a parallelized make to outperform me again - no?
I knew someone would find this an interesting topic.
I should also mention I have 256MB of RAM, and Baracuda SCSI-Ultra
drives with tagged queuing enabled.
OK, I turned off my custom flags, and got for -O1:
real 3m8.080suser 2m21.752ssys 0m35.291s
I usually do:
CUSTOM_COPT=-g -Wall -O1 -Wmissing-prototypes -Wmissing-declarations
My bet is the symbol output takes some time to produce. I noticed the
link of the postgres binary was faster without -g.
With parallelization, using gmake -j2, I got:
real 3m8.980suser 2m23.442ssys 0m36.142s
Not sure why -j2 is not faster than normal -j, unless gmake knows to use
-j2 on a 2-cpu system by default. Looking at the xps output, I don't
see multiple compiles being performed by gmake.
Gmake -j fails because compiles happen before supporting files are
created.
-- 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,
Pennsylvania19026
