Re: Some benchmark comparison of gcc4.5 and dragonegg (was dragonegg in FSF gcc?)

[Toon Moene <toon at moene dot org>]

Robert Dewar wrote:

> Actually for my taste, you have to get a MUCH bigger factor in compile
> time before you can call yourself a fast compiler (Realia COBOL by
> comparison compiles millions of lines a minute of code on current
> PC's, using just one core).

Obviously, apart from comparing a sufficiently large set of compilers on 
this, "speed of compilation" is mostly in the eye of the beholder.

Subjectively, as of gcc/gfortran 4.4, our (roughly 1 million lines of 
Fortran + 30,000 lines of C) code gets compiled (optimized and 
vectorized at -O3) in about 5 minutes on a quad core machine (using make 
-j8).

As an absolute number, this tells you nothing.  But as a measure of 
usefulness, it means that from 4.4 onwards, it is possible to recompile 
our complete weather forecasting suite at *every* new run, 4 times a day.

You bet that's sometimes useful ...

--
Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
At home: http://moene.org/~toon/
Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html#Fortran