RE: [gentoo-dev] gcc 2.95.3 / 3.0.4 speed comparsion

[Ric Messier]

I think the important question is -- does gcc3 generate better/faster
code? If it generates faster code, I'm okay with spending a little more
time to create it because over the life of the system, the amount of
time I spend compiling is small in comparison.

Ric


|> -----Original Message-----
|> From: gentoo-dev-admin@g.o 
|> [mailto:gentoo-dev-admin@g.o] On Behalf Of Spider
|> Sent: Sunday, April 07, 2002 6:55 PM
|> To: gentoo-dev
|> Subject: [gentoo-dev] gcc 2.95.3 / 3.0.4 speed comparsion
|> 
|> 
|> Hello, I've just upgraded my -rc6 to -1.0-gcc3 and decided to make an
|> (unofficial) benchmark.
|> 
|> I went for galeon, I had originally intended to use mozilla, 
|> but the time-results borked so I go for galeon instead.. 
|> smaller codebase, so its not as great difference, but it 
|> does have both c and c++ code, so it might be a decent choice.
|> 
|> 
|> gcc 2.95.3 :
|> real    3m38.592s
|> user    2m46.810s
|> sys     0m28.100s
|> CFLAGS="-march=i686 -O3 -pipe"
|> CXXFLAGS="-march=i686 -O3 -pipe"
|> 
|> 
|> gcc 3.0.4 :
|> real    5m6.465s
|> user    3m27.440s
|> sys     0m30.140s
|> CFLAGS="-march=athlon -O3 -pipe"
|> CXXFLAGS="-march=athlon -O3 -pipe"
|> 
|> 
|> 
|> 
|> if you only compare the "user" time it should be enough... 
|> as the "sys" show, there's a few percentages difference 
|> between them, so this is not scientific or anything.
|> 
|> Would be interesting to compare the results as well, since 
|> those are quite likely rather different with the new levels 
|> of optimization...
|> 
|> 
|> //Spider
|> 
|> 
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