From owner-cvs-all  Thu Apr  5  8:26:12 2001
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To: Maxim Sobolev <sobomax@FreeBSD.org>
Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: ports/devel Makefile ports/devel/dlmalloc Makefile distinfo pkg-comment pkg-descr pkg-message pkg-plist ports/devel/dlmalloc/files Makefile README.FreeBSD 
In-Reply-To: Your message of "Thu, 05 Apr 2001 08:17:33 PDT."
             <200104051517.f35FHXb44816@freefall.freebsd.org> 
Date: Thu, 05 Apr 2001 17:26:02 +0200
Message-ID: <22562.986484362@critter>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
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In message <200104051517.f35FHXb44816@freefall.freebsd.org>, Maxim Sobolev writes:
>sobomax     2001/04/05 08:17:33 PDT
>
>  Modified files:
>    devel                Makefile 
>  Added files:
>    devel/dlmalloc       Makefile distinfo pkg-comment pkg-descr 
>                         pkg-message pkg-plist 
>    devel/dlmalloc/files Makefile README.FreeBSD 
>  Log:
>  Add dlmalloc 2.7.0, a very efficient malloc/free/realloc implementation.
>  
>  According to my tests it is *amazingly* efficient - it gave me about 10%
>  memory saving (SIZE in the top(1)) for the large processes like X and jre
>  without any measureable performance saturation.
>  
>  Moreover, due to not very clear for me reasons Python benchmark (pybench)
>  is about 60% (!!!) faster with this allocator comparing to the libc one.
>  Obviously we should investigate this further and if there is no error
>  then tune either Python or our own malloc.

Did you measure this with the right malloc flags for the libc version ?

Remember that -current runs with malloc flags "AJ" as default, that is not
fair if it comes to performance comparisons (but it does wonders for finding
bugs :-)

--
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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