Fortran Execution Time Benchmarks
All figures are Execution Times in Seconds - measured on a measured on
a machine with an AMD Phenom II X4 955 processor (3.2 GHz), running Windows
7 64-bit. Each figure is the average over at least 10 runs (many more for
some). Measurement error is typically <1%. Green cells highlight figures
within 10% of the fastest. Red cells indicate figures which are more than
150% of the fastest.
So far as possible, we have used the compiler switches which give the best
overall results. We have not attempted to tune individual benchmarks, and,
in particular cases, different switch settings may give better results.
We have created and used 64 bit executables where possible, and 32 bit
executables where the compiler does not offer a 64 bit option.
The settings used for the Intel and Absoft compilers enable autoparallelization.
Autoparallelization settings are not used on any other compilers because
we found that they produced no significant performance benefits on this
Thanks are due to Jos Bergervoet for permission to use his CAPACITA benchmark,
to Quetzal Associates for permission to use their CHANNEL, FATIGUE, GAS_DYN,
INDUCT, PROTEIN and RNFLOW benchmarks, to David Frank for his TEST_FPU
benchmark, and to Ted Addison of McVehil-Monnett Associates for permission
to use AERMOD, an air quality model used by the US Environmental Protection
All the benchmarks have been modified slightly to fit into our benchmarking
The NF benchmark uses "nested factorization", a little known
but very effective iterative linear solver for huge finite difference matrices.
A paper describing nested factorization, and comparing it to other methods
is available here.
This Benchmark comparison was produced by Polyhedron Ltd. and this page
is reproduced with permission from Polyhedron Ltd.