[LLVMdev] gfortran benchmarks

[Jack Howarth]

   Since the fact that gfortran performance has improved
over the major releases, I decided to benchmark the current
releases on a MacPro with the Polyhedron 2005 benchmarks
using -ffast-math -funroll-loops -msse3 -O3. The results
are...

                    gcc release
            gcc 4.2.4      gcc 4.3.3    gcc 4.4-pre   gcc 4.3.3/   gcc 4.4-pre/
                                                      gcc 4.2.4    gcc 4.2.4
ac          15.32          13.04        12.65         0.851        0.826
aermod      22.96          26.65        25.52         1.161        1.111
air         8.15           7.58         7.10          0.930        0.871
capacita    52.16          52.45        49.56         1.006        0.950
channel     5.17           3.39         1.81          0.656        0.350
doduc       34.43          34.89        35.28         1.013        1.025
fatigue     12.57          10.92        10.13         0.869        0.806
gas_dyn     13.59          7.68         7.63          0.565        0.561
induct      28.61          48.46        14.88         1.694        0.520
linpk       15.46          15.48        15.50         1.001        1.003
mdbx        12.41          12.94        12.36         1.043        0.996
nf          27.08          27.25        25.50         1.006        0.942
protein     41.61          41.18        39.12         0.990        0.940
rnflow      35.37          32.58        30.68         0.921        0.867
test_fpu    11.94          10.79        10.50         0.904        0.879
tfft        2.13           2.11         2.08          0.991        0.977

Certainly it would be nice eventually resync llvm-gcc against something
newer.
             Jack