Jan Wieck wrote: > >> >My gcc 2.95.3 manual says: > >> > > >> > -pipe Use pipes rather than temporary files for communi- > >> > cation between the various stages of compilation. > >> > This fails to work on some systems where the assem- > >> > bler cannot read from a pipe; but the GNU assembler > >> > has no trouble. > >> > > >> >so it looks like we can't use it on all platforms without testing. I > >> >will enable it for linux. Do people want to test other platforms? > >> > >> It should work on any platform that uses the GNU tools, so that means > >> *BSD is in the same boat as Linux. > >> > >> Does it really speed compilation though? I saw somewhere that it > >> didn't make much difference and might even hurt sometimes. > > > > I saw a 5 second improvement with -pipe on a 150 second full compile of > > PostgreSQL. However, I have a MFS /tmp. I suppose if I didn't, it > > would be slower. However, the difference is so small as to be > > meaningless. Can someone else test on another *BSD and report? > > > > Also, IIRC you have a dual processor box. In that case using -pipe helps > to utilize 2 CPU's (not much though), whereas on a single CPU system it > forces extra context switches that aren't necessary when running the > stages sequential.
Oh, OK. I am on a dual, so maybe that's why I see an improvement. If I can get another BSD guy to test this, I can remove the pipe for all the BSD's. -- 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
