[Gambas-user] Big Gambas3 slowdown on hex edit / compare program

[Fabien Bodard]

2011/12/14 Caveat <Gambas at ...1950...>:
> Hi,
>
> I have a program that compares small binary files (either 1k or 4k so
> really quite small files!).
>
> The program builds the GUI based on whether the user has chosen to view
> the data from a Mifare 1k card or a Mifare 4k card.
>
> Problem is that when building the view for the 4k card, the program
> slows down to a crawl.  There are 8192 textboxes built in 2 columns of
> 64 panels (64 textboxes per panel), with a bold label against each panel
> indicating the sector number on the card.  This arrangement represents
> the sectors on a Mifare 4k card.  The side by side column view makes for
> a very nice, quick visual check on where the cards differ.
>
> The slowdown doesn't appear to be linear, that is the more items there
> are to add (or have been added), the slower and slower it gets.  I get
> the impression Gambas may be frantically shuffling things around on the
> form, and finding more and more things to shuffle, so taking longer and
> longer as each item is added.  To see the slowdown for yourself, just
> try selecting Mifare 4k in the dropdown under Mifare Card Type, you
> don't need to load any files or run Compare...
>
> I have tried replacing the whole panel/textbox/scrollview thing with a
> GridView and it works, a LOT faster, but then you have no possibility to
> edit the data (coming in a later version of the program!).

Use tableview instead of gridview !!!


>
> If anyone can take a look and suggest some improvements, I'd be more
> than happy!
>
> Kind regards,
> Caveat
> P.S.  Project is attached, it is a work in progress...!
>
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-- 
Fabien Bodard