Re: [GSOC] Speed up AbiWord for very large documents

Hi,
Martin Sevior,

Thank you very much for your reply, and i'm sorry for late to reply.
The links in your reply are excellent. Please if you can let me to
know, how to get the Erisin Akinci branch?

There might be many grammer mistakes in my mails(english isn't my
mother tongue), i'm sorry for that too. :)

Many thanks,

Sameera Kumsrasingha.

On Wed, Mar 30, 2011 at 3:46 PM, Martin Sevior <msevior@gmail.com> wrote:
> Dear Sameera,
>
> This is indeed a changing project that goes to the heart of the
> abiword codebase. AbiWord now has a state of the art-piecetable that
> enables, searches, insertions and deletions to be performed in log(N)
> time. Where N is the number of words inthe document.
>
> See:
> http://msevior.livejournal.com/26736.html
>
> and
>
> http://www.abisource.com/wiki/AbiWordDevelopment#PieceTable_speedups
>
> Having fixed the core of the project we're now working through the
> layout classes and finding and fixing the various inefficiencies and
> assumptions that slow performance for documents > 1000 pages.
>
> Last year we had another successful AbiWord GSoC project by Ersin
> Akinci who worked through a number of these bugs and fixed them. His
> branch has not yet been merged into trunk because of some periphial
> bugs he introduced in the process of fixing various slowness issues.
>
> The first part of this project would be to complete Ersin's work and
> get it committed to trunk. Following that would be the real challenge.
> We would need to re-implement the BreakSection classes that sorts text
> into lines on the screen so that it does not immediately layout all
> the lines below the current insertion point every time the number of
> lines changes.
>
> I was thinking that this could be changed so that the only the lines
> on screen are layed out immediately. The rest could be adjusted on a
> scroll and/or as a background processes between keypresses.
>
> Now to be frank, Ersin has privately told me that he intends to apply
> for GSoC this year and that he would like to finish off this project.
> He has not yet put in his application. If he does it would be very
> hard for a new student to compete against his proposal since he
> already understands much of the code and knows about the issues and
> problems that need to be addressed.
>
> Best regards,
>
> Martin Sevior
Received on Mon Apr 4 00:07:37 2011