[Digikam-devel] [Bug 269467] New: writing metadata- strange observation

[Axel Krebs]

https://bugs.kde.org/show_bug.cgi?id=269467

           Summary: writing metadata- strange observation
           Product: digikam
           Version: 2.0.0
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel at kde.org
        ReportedBy: axel.krebs at t-online.de


Created an attachment (id=58357)
 --> (http://bugs.kde.org/attachment.cgi?id=58357)
Data showing percentage of writing metadata in files, as a function of time

Version:           2.0.0 (using KDE 4.6.1) 
OS:                Linux

my statistics are as follows:

digiKam version 2.0.0-beta4
AVI:                        59
GIF:                        99
JPG:                     57060
PNG:                       624
RAW-CR2:                   629
RAW-CRW:                 10978
RAW-DNG:                     4
RAW-NEF:                 25526
TIFF:                      686
Gesamtzahl der Einträge: 95665
Alben:                    1481
Stichwörter:                43
Datenbanktreiber:      QSQLITE

In 2009, I started producing (quite large) panoramas with HUGIN

If I start > EXTRA > "writing all metadata in picture", the writing speed is
quite constant, irrespective(!!) several different file-formats.

After about 3 hours(?), my computer witch to screen saving modus. 
When continuing the writing procedure again, the writing speed _decreased_
significantly. 

Please have a look at attached csv-file. Date show a knee in the curve- why??

- Is there a real reason for this effect?
  (emptying a cache and not able to use it again if re-start writing, e.g.!?)  

- Why digiKam cannot re-gain it writing speed again?

Something keeps on beeing strange with writing metadata, I guess.
Can you answer my questions?


Axel

Reproducible: Always

Steps to Reproduce:
just start DK, 
start writing metadata, and wait for set-on of screensaver 



OS: Linux (i686) release 2.6.35-28-generic-pae
Compiler: cc

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