David Z Maze wrote:
Jerome BENOIT <jgmbenoit@wanadoo.fr> writes:I have a very naive question: Can Debian tune the GNU C Compiler ? [e.g., put `-cpu=pentium' automaticly on Pentium box]There's a pentium-builder package that tries to do this, or you can try to set CFLAGS for the program in question. With a limited number of exceptions, though, conventional wisdom is that this buys you little in performance at the cost of portability of binaries to other x86-based machines.
To be frank, the question arised when I read in gsl-1.3/INSTALL:
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Hints for Intel (Pentium)
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For the Pentium 4 with GCC-3.2 the flags,
CFLAGS="-O2 -march=pentium4 -mfpmath=sse -msse2"
increase performance by 33% (reported by Sam Halliday <fommil@yahoo.ie>)
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Since I use my Deabian box mainly to make numerical computations,
I begin to think about these exceptions
Jerome