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Wednesday, September 14, 2005
Floating Point Benchmark: Common Lisp Benchmark Added
I have just posted a Common Lisp implementation of the floating point benchmark (the original trigonometry-intense fbench, not the FFT-based ffbench) and added results from GNU Common Lisp 2.6.7 in both compiled and interpreted modes to the language performance comparison section of the fbench document. Here is the updated relative performance table.
| Language | Relative Time |
Details |
|---|---|---|
| C | 1 | GCC 3.2.3 -O3, Linux |
| Visual Basic .NET | 0.866 | All optimisations, Windows XP |
| FORTRAN | 1.008 | GNU Fortran (g77) 3.2.3 -O3, Linux |
| Java | 1.121 | Sun JDK 1.5.0_04-b05, Linux |
| Visual Basic 6 | 1.132 | All optimisations, Windows XP |
| Ada | 1.401 | GNAT/GCC 3.4.4 -O3, Linux |
| Lisp | 7.41 19.8 |
GNU Common Lisp 2.6.7, Compiled, Linux GNU Common Lisp 2.6.7, Interpreted |
| Python | 17.6 | Python 2.3.3 -OO, Linux |
| Perl | 23.6 | Perl v5.8.0, Linux |
| JavaScript | 27.6 39.1 46.9 |
Opera 8.0, Linux Internet Explorer 6.0.2900, Windows XP Mozilla Firefox 1.0.6, Linux |
| QBasic | 148.3 | MS-DOS QBasic 1.1, Windows XP Console |
The Common Lisp benchmark is a straightforward translation of the reference C implementation; while I have tried to replace C idioms with those of Lisp, I have not attempted higher level restructuring, which I would consider to exceed the mandate of the benchmark, a straightforward computer implementation of a computation originally done manually with tables of logarithms and trigonometric functions. Common Lisp provides a variety of advisory declarations intended to assist compiler optimisation. For example, one can declare that a variable always takes on floating point values so compiled code doesn't have to worry about your assigning a list to it. This program is written in "Classic Lisp" and uses none of these declarations (which had no measurable effect in my very limited experiments with GNU Common Lisp). Lisp experts and those interested in evaluating other Lisp compilers may wish to add declarations where appropriate.
Posted at September 14, 2005 15:45