[Mono-dev] System.Decimal performance

[Zoltan Varga]

Those are now fixed in SVN.

        Zoltan

On Mon, Jun 2, 2008 at 10:53 PM, Andreas Nahr
<ClassDevelopment at a-softtech.com> wrote:
> There are massive regressions in System.Data that seem to come from the
> changes in decimal.c
>
> Andreas
>
>> -----Ursprüngliche Nachricht-----
>> Von: mono-devel-list-bounces at lists.ximian.com [mailto:mono-devel-list-
>> bounces at lists.ximian.com] Im Auftrag von Zoltan Varga
>> Gesendet: Montag, 2. Juni 2008 22:15
>> An: Leszek Ciesielski
>> Cc: mono-devel-list
>> Betreff: Re: [Mono-dev] System.Decimal performance
>>
>>                  Hi,
>>
>>   The next mono release (2.0) will have better decimal performance,
>> especially
>> when doing divisions.
>>
>>                     Zoltan
>>
>> 2008/5/29 Leszek Ciesielski <skolima at gmail.com>:
>> > Hi,
>> >
>> > the company I work for builds finance-related software, so we use the
>> > Decimal type a lot. And in any computation-heavy program we find that
>> > the Mono implementation of the decimal type... well... let's just say
>> > it's not on par with MS.Net performance ;-) . Addition, substraction
>> > and multiplication lag a bit (2-4 times slower). However, division is
>> > at least 10 times slower, in some cases even 50x! I don't have any
>> > complex tests at hand right now, but a simple performance-measuring
>> > program is attached to the mail. There's also a java version
>> (although
>> > BigDecimal is not a simple equivalent of System.Decimal as it has no
>> > upper bound on available precision). From my simple test the results
>> > are as follows:
>> >
>> > MS.Net 3.5
>> > addition 2375 ms : 2354,156132
>> > substraction 2140,625 ms : 2337,043868
>> > multiplication 1734,375 ms : 189,08461995264
>> > division 8468,75 ms : 29097,233616240416508043573961
>> >
>> > Mono 1.9 Windows 2.0 profile
>> > addition 4812 ms : 2354,156132
>> > substraction 4781 ms : 2337,043868
>> > multiplication 3407 ms : 189,08461995264
>> > division 61390 ms : 29097,233616240416508043573961
>> >
>> > Mono svn-linux 2.0 profile
>> > addition 4201.837 ms : 2354.156132
>> > substraction 4413.458 ms : 2337.043868
>> > multiplication 4489.036 ms : 189.08461995264
>> > division 61303.573 ms : 29097.233616240416508043573961
>> >
>> > Java 1.6.0_06
>> > addition 4640 ms : 2354.156132
>> > substraction 3969 ms : 2337.043868
>> > multiplication 2219 ms : 189.08461995264
>> > division 33376 ms : 29097.233616240416508043573961
>> >
>> > Has anyone done any performance tunining with the decimal type?
>> >
>> > Regards,
>> >
>> > Leszek 'skolima' Ciesielski
>> >
>> > --
>> > MS-DOS user since 5.0
>> > Windows user since 3.11
>> > Linux user since kernel 2.4
>> > Novell Netware user since 2.2
>> > WARCRAFT user since 1.0
>> >
>> > _______________________________________________
>> > Mono-devel-list mailing list
>> > Mono-devel-list at lists.ximian.com
>> > http://lists.ximian.com/mailman/listinfo/mono-devel-list
>> >
>> >
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>
>