Re: [Patch] Nathan's improvements to basic_string

[Andreas Jaeger <aj at suse dot de>]

Nathan Myers <ncm-nospam@cantrip.org> writes:

> I did some testing on a 1.4 GHz Opteron, which generally seems
> comparable to a 2.4GHz P4.
>
> On Thu, Jun 12, 2003 at 01:14:00PM -0700, Nathan Myers wrote:
>> On Thu, Jun 12, 2003 at 09:01:05PM +0200, Paolo Carlini wrote:
>> > Indeed, the improvements are easily measurable even on
>> > single processor machines, like my P4-2400/linux.
>> > ...
>> > Current mainline:
>> > -O0: 11.900u 0.000s 0:11.98 99.3%    0+0k 0+0io 204pf+0w
>> > -O2: 10.420u 0.010s 0:10.51 99.2%    0+0k 0+0io 204pf+0w
>> > 
>> > Current + Nathan's:
>> > -O0: 3.310u 0.000s 0:03.32 99.6%     0+0k 0+0io 201pf+0w
>> > -O2: 0.350u 0.000s 0:00.35 100.0%    0+0k 0+0io 201pf+0w
>
> The first interesting result is that at -O1 it says 
>
> gnu/include/c++/3.4/x86_64-unknown-linux-gnu/bits/atomicity.h: In 
>    function `int main()':
> /amd/ncm/gnu/include/c++/3.4/x86_64-unknown-linux-gnu/bits/atomicity.h:43: error: inconsistent
>       operand constraints in an `asm'

Honza, isn't this the bug in gcse that you're hunting down?

Andreas
-- 
 Andreas Jaeger, SuSE Linux AG, aj@suse.de, http://www.suse.de/~aj
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