Re: [Opsim-developers] Monthly update April, 2016

[Matt H. <nw...@gm...>]

Thanks Darius,

I downloaded from SVN and compiled over the weekend.  So far I haven't been
able to get Firebird running (the ebuild in gentoo doesn't like the classic
version) but everything compiles ok.  No need to write an article.. i was
just curious.  I am following the development and applaud your efforts.

On Thu, May 5, 2016 at 9:41 AM, Darius Blaszyk <dhk...@gm...> wrote:

> Hi Matt,
>
> Thanks for your message. I can't really comment on what happened in the
> past as I was not involved. Sorry for the frustrations, but I have been
> there myself. It's never easy working in teams, let alone in such volatile
> environments like open source. To maintain quality in OpSim development and
> keep people involved I find this to be one of my main tasks to concentrate
> on after I firm up the foundation of the code. In my opinion a more
> structured approach, demonstrated in my work towards modularizing OpSim,
> and posting articles on progress (and later on decent proposals and reviews
> regarding changes of the code), will lead to a better alignment of the team
> (once / if there will be volunteers to join :) ).
>
> Regarding your question on classes vs records, please check my WIP branch
> on sourceforge:
> https://sourceforge.net/p/opsim/code/HEAD/tree/branches/opsim_darius/classes/
>
> There's a readme in that folder with some test results. The overall
> conclusions are pasted in below in this e-mail You can check the test out
> from SVN and try for yourself if you like. I was not planning on writing an
> article on this, unless there will be requests.
>
> Regards, Darius
>
> The results from these tests indicate that records take up about 30-45% less RAM. Creating records is 1,5 to 6 times faster and assigning values is 2.3 to 4 times faster. The creation time is less critical as this is typically done once (when loading a file) for large amounts and the overall time is relatively short for both methods. However assigning values is done regularly by the solver and in great amounts and can amount to a noticeable or even annoying lag of the UI. Also the amount of memory used is important as large models can lead to memory paging which lead to a significant drop in performance.
>
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