[Gprename-users] Performance with GPRename 2.0 - Revision 11

[Zurd <zu...@ya...>]

> Perhaps I was not clear. I meant to say that v2.0
> loads *faster* than the old versions, particularly
> faster than 1.3. As for operation on files, I haven't
> noticed a significant difference, but v2.0 'feels'
> faster overall.

I just installed version 1.3 to see the difference, 
it's about the same thing really, both opens with around
1-2 seconds of delay, but I think it's possible that 2.0 
feels faster because I'm now using $window->show_all(), 
instead of showing every items one by one (button, menu item, 
radio button, entry box,etc.), perl shows everything in one 
shot, so we're not seeing items created one by one, it's all
appearing together.


Now with the operation of files, that is quite interesting
actually.  I used my watch as a timer and renamed 300 files,
it took 30 seconds, it seemed that the application was frozen
but it was still processing.  30 seconds is a long time.  So
I've gone into the function of check_before_renaming and done
some modification, now it's taking half of the time to rename
the 300 files, so 15 seconds.  A nice improvement.  You will not
see how slow it is if you rename only a few files.  Here's what
my latest test shows when renaming :
100 files : 3 seconds
200 files : 8 seconds
250 files : 11 seconds
300 files : 15 seconds

But still... it is really troublesome, some people might want to rename
10,000 files and having to wait maybe 5 minutes for it is completely
unnaceptable.

So I just tought of a new way that would be much faster to do the
renaming but I will have to implement the undo function first. Here's what
the new function will do :
Check if the file with the new name already exist, if not, rename and pass
to the second file.
If it ever sees a file with the new name that already exists, print an error 
message that the renaming cannot be done because of the error and call the 
undo function.  So it'll be like no renaming has been done.

This was added in the To Do.

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