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big slowdown in egcs-1.1.2->gcc-2.95 on alpha


I'm running a Genetic Programming system, where compile times are as
important as run times.  I noticed that gcc-2.95 is a *lot* slower than
egcs-1.1.2 on my alpha-ev6 running Red Hat 6.0 with binutils 2.9.5.0.3

Here are some typical times:

egcs-1.1.2:

/usr/bin/time /usr/bin/gcc -mcpu=ev6 -fPIC -O1 -c -D___DYNAMIC -D___SINGLE_HOST system.c
106.60user 0.17system 0:13.49elapsed 790%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (2248major+8092minor)pagefaults 0swaps

gcc-2.9.5:

/usr/bin/time /export/u10/gcc-2.95/bin/gcc -mcpu=ev6 -fPIC -O1 -c -D___DYNAMIC -D___SINGLE_HOST system.c
250.77user 0.24system 0:31.59elapsed 794%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (2330major+15298minor)pagefaults 0swaps

(The user and system times on this box are too big by a factor of 8.)

I try to be an independent guy---I installed a test version compiled with
-pg, but gprof on my platform dumps core (both the original one and the one
with 2.9.5.0.3) so that isn't much help.

Any suggestions?  Anybody else notice this?

Brad Lucier   lucier@math.purdue.edu


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