Fotothek "Time consuming"

I have one basic folder called pictures. The subfolders follows the name convention “yyyy mm description”.
Every time I put some pictures in folders, opening DXO and choose one of the new folders the thumbnails appears picture after picture after… and there are two round arrows moving within the thumbnail picture.
In my basic setting I’ve selected “no settings for RAW and RGB Pictures”.
Working in the first new folder after DXO has finished whatever it does works fine, but after selecting the second new folder it take again some time
So my questions are.

  • What is so time consuming (it’s Core i 7 with 32 GB RAM) and opening the same folder within different other programs are most faster
  • If its necessary for DXO whatever it does, why DXO can’t do this job in the Background? So it would be time consuming for the first folder, but not for the other one’s.
  • Or is there one setting I’v not noticed

Any ideas or infos welcome

Whatever the preview jpeg in your raw files is, DPL will calculate a new thumbnail/preview. Even “no correction” does something - every raw converter does things according to what it considers to be “normal” or “no correction” - and this takes time and processing power.

#platypus Thank’s for demistify the process, but in my opinion all programs will calculate previews. So why are LR, darktable, Rawtherapee eg. are so much faster?
I’ve tested a lot of programs the last months and DPL are slowest on my machine. I like the tools and workflows within DPL but speed is not the strength.
Maybe I will put point 2 of my question at the request list " opening DPL and calculate all new folders in the background"
Thank you

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We are aware that our Filmstrip is longer in loading in comparison with some other applications. @platypus is correct that it’s not a naked load but needs some calculation. But the good news is that we are going to devote some time to investigation and optimization of the FS loading. We’ll do our best.

Svetlana G.


sounds good for the future and as user of DXO since DxO Optics Pro Standard 7.2 :slight_smile: i can wait.
Maybe I’m impatient, because I’ve a lot of time to photograph and develop at the moment :grinning:

…just did a series of tests with DPL v2 and v3, both give me comparable results.

  1. Rendering 60 images in Library view takes 20 seconds with “No Correction”
  2. Rendering after the above with “DxO Standard” takes about 30 seconds
  3. Rendering can also take up to 10 seconds longer, I can see no pattern though
  4. CPU load never exceeded 290% but stayed around 100-150% most of the time

No other app was launched by me during the tests.
Started with DB and Cache files deleted and (app) settings set to “No Correction”.
Mostly, progress follows the sort order but sometimes, an image is left out and rendered last. Inverting sort order to and fro sets rendering order equal to sort order.

Compare with Lightroom: Applying a b/w preset takes less than 10 seconds, ctrl-z to previous is less than 1 second while DPL seems to re-render (which takes 20 seconds) instead of grabbing from the cache.

Tech: 8-core 27in all-ssd iMac 2019 running current Mojave release, 60 images (total) of EOS 5D and EOS 5D3 ranging from 12MB to 37 MB (1.35 GB on volume), sidecar in/export switched off

Just some personal observations;

  • PL’s strength is as an excellent RAW file converter - with enough image enhancement features that it can typically handle most image editing requirements without requiring any other tools.
  • it’s strength is NOT as a general image browsing tool - - but, there are plenty of free tools around that do this very well (eg. Irfan being just one of them).
  • I process images (using PL) in small batches of no more than 25 RAW files at a time . . . making processing time adequately responsive.
  • I move the generated results to a storage folder - and I use a fast browser to display the results.
  • I certainly don’t expect PL to be able to browse 100s (or 1000s !) of images.

John M


Why not? For sure I don’t use PL for culling, but loading even a collection of 1k holiday photos takes way too much time. Should not be too difficult to speed browsing up - just take a look a Rawtherapee’s sources :wink:

And that’s my point, Gerrit - - Why would you need to load all 1,000 of your photos all at the same time ?


The Fotothek or filmstrip is for browsing / selecting images, so the thumbnails have to be loaded - otherwise I don’t need a filmstrip. Yes, I could split the images in more folders, but that’s even more awkward.

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I do that - John.

My steps are:

  • load and cull into Photo Supreme.
  • After an i.e trekking trip etc… I come back with maybe around 2500 “keepers”
  • Now my folder structure is based on Peter Krogh’s “DAM book”. The structure is simple:



My folder structure is purely based for storage. I do NOT do any DAM-activity on that structure. Keywording, projects, tagging, geo-tagging is all done in the DAM software.

All of he the above means I have thousands of files in any given year in specific folder for a year - 11000 in one year is my record.

So for me it is important how fast DPL can load either in the library or customize panel


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I already was afraid to be the only one with so many “keepers” (not all of them probably won’t be keepers 6 months later, though).
Photos are organized in folders, too, I name them like this: [year][underscore][month]optional:[underscore][Event]

(The forum interprets underscores as format qualifiers, I have learned now btw)

Hi folks,
as TO i would like to make some statements, so we don’t drift into comparing apples with pears :grinning:, or drift into a bit fucking solution.
I know that there will be faster machines, faster picture browsers faster operating systems and so on. I don’t like to use several programs for splitting my workflow. And as Svetlana wrote there ar some bottlenecks in speed. And John I know tools like Irfanview, XN View and others but I only use them für batch renaming, or showing shows to my friends after used DXO for optimize and develope pictures.
Most of the things I will do in DXO

  • Moving all photos after session in several folders with Windows explorer
    Starting DXO to check first folder, waiting…then deleting bad ones
    Check second folder, waiting…then deleting bad ones
    …and so on with for example 5 folders each 100 to 150 photos
    that’s the time delay i spoke about.
    Then i will rate them for the first time
    Optimizing and developing for me is not the problem, because I only develop photos I need for a poster or Diashow.
    After optimizing I give them the green checkpoint in german Version “Wählen”
    Afterwards I choose all pictures with green Checkpoint and start developing…I will drink 1 or 2 glasses of wine, go to bed and next morning I got the result

So in my mind we can trust to the DXO developers bringing all their brain to speed up the filmstrip, or using parallel and background processes in the near future.:smiling_face_with_three_hearts:

Thanks for joining the discussion and enjoy the weekend with taking photos :smile:

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I have a folder where all incoming pictures are imported first and I’m distributing them after I adjusted them. So roundabout 9k pictures ALWAYS in that folder. And if I’m opening PL for any of those instead of LR (which doesn’t have any problems whatsoever), PL will just keep on doing unknowns stuff and I can basically never do anything with it, when the picture is in that folder . So I’m using PL quite rarely even though it’s my favourite picture processing program (better than LR and and better than Aperture, although not in all aspects, even excluding the performance issue).

Dear Ioan, thanks for the response because that’s the next mystery I noticed the last days. After starting the thread february 13th I have been choosen all my folders, waiting PL was ready with indexing and whatever it does. This took a while but it’s ok. Today I want to work within my Ballenstedt/Beelitz photos (rotten places in Germany) and PL shows first pictures, but a row of them stands wit “Load. Please wait”, or nothing at the thumbnail frame. It took’s a few seconds until all thumbnails were shown. And that are two folders are often used before. The secret of PL continues:orangutan::orangutan:
That’s only supplementing to my thread.

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It’s interesting to see people talk about how many “keepers” they have, and even as a function of time.

Want to know what my keeper rate is? 100%. Yep, all of them.

But then I don’t have quite the numbers of photos that some here have. I went on a two week holiday last April and came back with 772 which are the only photos I took that month (I have monthly folders). Then again, in January 2020 I have 522 photos and 501 of those were taken in the space of a few hours one day.

The reason I keep everything is hinted at above — I’ve never met anyone who doesn’t change their mind over time as to what is worth keeping. Most often you hear about deleting more photos as time passes, but what about those photos you delete now and maybe later you wouldn’t have? After switching to PhotoLab I’ve been so impressed by the quality I’m getting I went back and reprocessed 100 images from 5 years ago … and picked 16 further photos from that event to publish for the first time.

And then there is the history aspect. What if you take a slightly blurry photo of someone that’s not a “keeper” but it turns out to be the last photo ever taken of them? You know when someone dies in tragic circumstances and the photo you see of them in the media is blurry and crooked? People who aren’t serious photographers don’t even think about deleting photos, and it’s just as well. You might think “ah, but these 10 photos are basically identical, so I only need to keep one” but are they? Maybe in one shot there is something in the background that has a significance only discovered later.

Finally… disk is cheap. It’s relative, sure, but it’s cheaper than it has ever been. Unless you are taking hundreds of photos every day, it shouldn’t be that expensive to keep them all. I have over 38,000 photos stretching back 16 years, have been shooting exclusively in RAW for 9 of those years, and it’s just over half a terabyte.

So yes, I would like PhotoLab to be snappy when viewing lots of photographs.


I have the same rate when taking large format film pictures.

The only difference is, I work out what I really want to photograph, arrange the taking position and composition, take exposure readings to ensure that the dynamic range is not too much for the film (slide film only has 5 stops), add graduated filters to bring brighter areas into range and, finally press the shutter.

Result - 1 transparency or negative, which I develop and scan.

If everything is not right, I don’t take the picture. Here’s one that took five return trips of 230km before I pressed the shutter…


So we discuss different types of taking photographs. I’m between Zkarj’s and Joanna’s philosophy.
Visiting rotten places you have to take as many photos as you can in time. Visiting the place weeks or months later you will not find the same place, light situation eg.
Back at home I have favourites and also photos I can delete without thinking about. And yes there are also some photos, I will keep, because like Zkarj says Raw developers will be better in Time. During Nikon time I have had photos Nikon Capture did not develop fine. Years later with DXO I noticed much better results in very light areas. So I think I am an 70% keeper, but for example my Beelitz folder has 380 photos and Ballenstedt about 500.

And many thanks for discussion, I like to hear about other peoples work and workflow

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Dilapidation is one of my favourite genre’s. Thanks for the photo Guenterm.

You are welcome…first I’ve to look what dilapidation means :joy: