Re: Performance issue of libtool-2.4.4

On Fri, 6 Feb 2015, Robert Yang wrote:

>
>
> On 02/06/2015 12:12 PM, Bob Friesenhahn wrote:
>> I am not seeing quite the difference between libtool releases that you are
>> although I see a big slowdown starting with 2.4.3.  These timings are for
>> optimized builds of GraphicsMagick on a 12-core GNU/Linux system using -j 
>> 12:
>
> I think that we can't see obviously slowdown by "make -jN",
> but "make -j1" will. And bash is much slower than dash, I'm trying to
> figure out why.

It seems like this issue is already corrected in the source tree but 
you are correct that the issue is much more apparent with -j1.

Optimized:

   2.4.2 : 3:43.43
   2.4.5 : 4:33.11

Non-Optimized:

   2.4.2 : 1:21.21
   2.4.5 : 2:05.48

We need a test case which is executed before every major release to 
make sure that a performance regression has not been introduced.

Bob
-- 
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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