not much to say dude, it should by no way be possibly slower than debian :-)
On Tue, 2003-10-21 at 21:56, Matt Garman wrote: > I just got a new hard disk and installed gentoo on it. I've got a c++ > development project that I was working on that runs noticeably slower on > my gentoo box than it did on under my debian unstable installation. > > I basically wrote a CSV file reader in C++. The implementation uses a > vector of vectors (one vector per row for each field, and a vector for > every row). In other words: > > std::vector< std::vector< std::string > > data; > > Anyway, my data file has roughly 50,000 records. Under the Debian > system, it took, on average, two or three seconds to load this data into > memory. However, under the Gentoo system, it takes eight or nine > seconds on average to load the data. (Run times don't change > appreciably between subsequent runs, so I don't think caching is the > issue here.) > > That's a pretty dramatic change, in my opinion. No hardware on my > system has changed (except the new disk, which I have verified is not > the source of the slowdown (it's a 10k SCSI drive, should be faster if > anything)). > > I haven't changed any compile settings from one system to the other. > Just for kicks, I tried using the optimising options I'm using for > Gentoo in my /etc/make.conf: "-O3 -march=athlon-xp -pipe". That knocked > a couple seconds off the load time, but the Debian-compiled version is > still much faster. > > For what it's worth, the Debian system used: > > g++ (GCC) 3.3.2 20030908 (Debian prerelease) > > And the Gentoo system is using: > > g++ (GCC) 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r2, propolice) > > Looks like Debian's is a bit newer. I don't follow gcc development > really---have their been drastic improvements in a minor revision? > > Tonight I plan to setup grub to boot the old system to do some more > investigating. > > Thanks for any comments or thoughts! > Matt > > > > -- > [EMAIL PROTECTED] mailing list -- Regards, Redeeman () ascii ribbon campaign - against html e-mail /\ - against microsoft attachments -- [EMAIL PROTECTED] mailing list
