From: | Christopher Glaeser <cdg@nullstone.com> |
Newsgroups: | comp.compilers |
Date: | 13 Nov 1997 23:41:56 -0500 |
Organization: | Compilers Central |
References: | 97-11-038 |
Keywords: | arithmetic, optimize, performance |
> [This has come up before. As I recall, it's not hard to invent
> heuristics that do pretty well, but it's extremely hard to generate
> optimal code. -John]
In addition to testing the run-time performance, be sure and test the
compile-time performance of the algorithm. When testing various
compilers with different repeating bit patterns, I have measured compile
times of several minutes per constant, and on rare occasion, have
measured compile times as high as one hour per constant.
Best regards,
Christopher Glaeser cdg@nullstone.com
Nullstone Corporation http://www.nullstone.com
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