Re: C++ compile-time regressions (was: GCC 3.0.1 Status Report)

[Joe Buck <jbuck@synopsys.COM>]

I wrote:
> > Gerald, could you test Daniel's change and see if it helps on your code?
> 
> Of course! Here we go:
> 
>           GCC 2.95.3           GCC 3.0          GCC 3.0.1-pre
>          Time    Size        Time   Size         Time   Size
>   -O0    6:19    3915128     8:20   4159780      8:00   4159588
>   -O1    4:20    4203480    11:40   4829732      7:09   3997668
>   -O2    5:56    4209368    14:09   4862532      7:53   3987556
>   -O3    5:47    4221464    32:04   6166052      7:54   3987140
> 
> The huge compile-time regression is gone, though we are still noticably
> slower than GCC 2.95; and binary size is even better than it used to be.

Elsewhere Gerald posted the size of the preprocessed code:

>  % wc -l 2.95/* | grep total
>  472019 total
>  % wc -l 3.0/* | grep total
>  575530 total

So the preprocessed code is 21% larger, and for -O0 it compiles 26%
slower.  After normalization for lines of preprocessed code, 3.0.1-pre is
only 3.8% slower on a per-line basis than 2.95.3 with optimization off
(normal mode for the typical compile/debug/fix cycle).

Smaller binaries too ... maybe the compiler's going to be OK after all. :-)