Re: [Libreoffice] Proposal: slowcheck -- some numbers for sc

On Wednesday 21 of September 2011, Michael Meeks wrote:
> On Wed, 2011-09-21 at 09:50 +0100, Caolán McNamara wrote:
> > In an ideal world I imagine the best spent effort would be on improving
> > the import speed for .ods and .xlsx, seeing as that improves the
> > real-world case too.
>
>       Agreed. Assuming that the files are of equivalent on-disk size, it's
> amusing that the old code is fastest and the newest slowest. It'd be
> really interesting to get a callgrind trace of ods / xlsx loading.

 Amusing maybe, but not strange at all. XLS is binary format, ODS and XLSX are 
XML-based. Any guesses on how much slower image loading would be if somebody 
came up with JPEGX? And, if calc import filters are written in at least 
somewhat similar way to writer import filters, then XML-based filters get 
additional penalty for XSL processing and abstractions, especially in a 
non-optimized build.

-- 
 Lubos Lunak
 l.lunak@suse.cz