[gentoo-user] Re: Gcc 4.3.4 ---> 4.4.1

[Nikos Chantziaras <realnc@arcor.de>]

On 08/15/2009 09:35 PM, 7v5w7go9ub0o wrote:
> Nikos Chantziaras wrote:
>
>>
>> AFAIK, the mudflap pointer checker is just a command line GCC switch.
>> You need to enable it explicitly using "-fmudflap".
>>
>
> ah.... o.k. I'm using the hardened overlay, and mudflap is a use flag
> defaulting to enabled. I'll post that second comment over in hardened.

I'm not on hardened, but mudflap is enabled by default here too.  What I 
don't know is whether hardened has "-fmudflap" enabled by default. 
Perhaps someone who knows more about this feature can shed some light on 
how this works exactly.


> I'd guess that most here would appreciate it if you post your
> impressions about graphite.

Overall system performance seems unchanged.  I would need to actually 
benchmark it.  I didn't do it yet, but you could emerge stuff like gzip, 
bzip2, oggdec (and other stuff that is easy to benchmark) with 4.4.1, 
run them on in-memory files (that means in /dev/shm) and time them (with 
the 'time' command) to see how big a gain there is.  For example:

   time bzip2 --best /dev/shm/500gb-test-file