Re: Suggestions for improving gcc 3.2 compilation speed?

[Mike Stump <mrs at apple dot com>]

On Friday, March 7, 2003, at 03:09 AM, Biagio Lucini wrote:
> Could you give me an example of a fast compiler? My only term of
> comparison is the Intel one, and with it it takes ages to compile the 
> most
> trivial program.

I have a g++ compiler that is 5.6x faster than the current g++ when 
compiling large C++ code bases.  That's when compared to a g++ PCH, 
without it, more like 8x to 16x faster when PCH isn't used.  Work in 
progress, but it shows that g++ can be fast, if we want it to be.  For 
trivial files, small projects and single files, the speedup is 0.

The patches help understand the upper limit on speedups possible if we 
just work smarter with header files.

To use, generate a file sorta like:

#include "AboutWindow/AboutWindow.cp"
#pragma translationunit "StatusBar/StatusBar.cp"
#include "StatusBar/StatusBar.cp"
#pragma translationunit "Preview/ColumnPreview.cp"
#include "Preview/ColumnPreview.cp"
[ ... ]

and then time a -S build of it and compare against a -S build of all 
the individual files.

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