[Shotwell] more on performance (Re: Usage performance shotwell vs. f-spot)

[oliver]

Two different versions (on two different computers with different
Linux) gave two different results.

Bothe with > 20.000 files.

First Version:
  The old Ubuntu 10.04 with shotwell 0.7.2 performed good only
  before stopping and restarting it. Afterwards it behaved bad.

Second Version:
  The shotwell 0.11.6 on Arch Linux (and same processor family,
  but dual core) performed much better, afetr a big import,
  even after restarting the program.

  When opening or closing a picture it needs some time,
  about one, but posisble up to some seconds.


(Any other stuff below, if not seperated mentioned,
 relates to second version, mentioned above.)

This is much better than former tests.
But what will happen if the number of pictures will become
even higher?

(The one time I tested with about 100k files was, where
all those filkes were inside one directory. This is unrealistic for
real photography and may be a problem of too much files in one directory
(filesystem issue). But I have so far ot a realistic set of data with
about 100k files, so time or seperate tests will show it.)

Both shotwell versions show the same behaviour which I also
found with my 100k bulk inesrtion test a while ago: when starting
shotwell, at about 50% of the progression bar in startup phase,
the progression stops for a while. (I think 49% and 50% seem to be a barrier).

All in all I can say: seems to work at least for that number of files
I have at the moment. Inserting the files took many hours, and I could
do that while sleeping.


After the import, One error occured after I scrolled forward and backward
and looked at some pictures:

==========================
**
ERROR:arraylist.c:1136:gee_array_list_iterator_real_next: assertion failed: (_tmp0_ == _tmp2_)
==========================
(with shotwell 0.11.6)

But after starting shotwell anew, and scrolling in the overview and looking at picture
arbitrarily, I could not provoke such an error so far again.
For now it seems like something coming from the import.

All in all: yes, now shotwell is my favourite and I will use it during the next
days for working on some of my pictures. With more experience I can send more
feedback to this list again.


Ciao,
   Oliver

P.S.: I'm astouned. Even I imported the files via directory, not fspot-database,
      my tags are there. I said to f-spot only to use databse-based tags, not comments
      in the jpeg's. But somehow by magic, shotwell recreated them...?!
      (Maybe the option to not use jpeg-comments was not working in f-spot??)