------- Comment #58 from dberlin at gcc dot gnu dot org 2005-10-13 04:07
-------
Subject: Re: [3.4/4.0/4.1 regression] C++
compile-time performance regression
On Thu, 2005-10-13 at 03:34 +0000, pinskia at gcc dot gnu dot org wrote:
>
> ------- Comment #57 from pinskia at gcc dot gnu dot org 2005-10-13 03:34
> -------
> A semi recent 4.1 (the 10th) gives:
> tree PTA : 1.60 ( 6%) usr 0.02 ( 1%) sys 1.73 ( 6%) wall
> 10338 kB ( 1%) ggc
> tree alias analysis : 1.32 ( 5%) usr 0.19 (10%) sys 1.48 ( 5%) wall
> 18910 kB ( 3%) ggc
>
> while 4.0 gave:
> tree PTA : 0.50 ( 2%) usr 0.00 ( 0%) sys 0.48 ( 2%) wall
> tree alias analysis : 0.73 ( 3%) usr 0.00 ( 0%) sys 0.76 ( 3%) wall
>
> So this is definitely a 4.1 regression.
>
>
I'm pretty sure we run PTA more times in 4.1 than 4.0
Maybe i'm wrong.
Can you oprofile this and give me some kind of hotspot to look into in
PTA?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8361
