Re: 3.3 compile time regression (22400%)

[Karel Gardas <kgardas at objectsecurity dot com>]

On Tue, 18 Mar 2003, Richard Guenther wrote:

> Hi!
>
> I'm experiencing huge compile time regression with todays 3.3 compared to
> 3.2 during compiling of the POOMA library. -ftime-report shows that the
> culprit is expand:
>
> gcc-3.2:
>
>  expand           :   0.83 ( 8%) usr   0.04 ( 8%) sys   0.94 ( 9%) wall
>
> gcc-3.3:
>
>  expand           :2151.80 (96%) usr  11.35 (44%) sys2181.19 (95%) wall
>
> This is with -O2 -fomit-frame-pointer -funroll-loops -ftime-report
>

Isn't it the same like in case of MICO?

http://gcc.gnu.org/ml/gcc/2003-02/msg02020.html  - report
http://gcc.gnu.org/ml/gcc/2003-03/msg00083.html  - flat profile provided (cc1plus)

and here is answer from Zack Weinberg:

http://gcc.gnu.org/ml/gcc/2003-03/msg00101.html

> The picture does change if I specify -fno-default-inline, in this case

That's interesting. I'll give it a try.

Cheers,

Karel
--
Karel Gardas                  kgardas at objectsecurity dot com
ObjectSecurity Ltd.           http://www.objectsecurity.com