Thredripper or Ryzen? - Use of multiple threads and cores

[support at hausoos.com]

Dear all,

Thank you!

To give you the context, and answer the questions, I am experiencing  
problem with most performance consuming tools in image editor, but  
even with previewing if I set previews to the whole image (rather than  
the embedded jpeg). If I flick through images for a quick overview,  
after a few images, digikam gets stuck, and then I have to wait a few  
second before moving forward.

I am working on RAW files generated by Fuji X-T4. They are about 36Mb.

Demosaicing works OK, but nothing brilliant. The problems gets worst  
when I use the most resource intensive tools: for example, if I want  
to add film grain, or blur or distortion effects, at every iteration I  
waste even 12 seconds. If I use oil paint, it takes 40 seconds to a  
minute. Distortion requires a very long time. Noise reduction, the same.

Face recognition, blur recognition, search, similarity analysis, on a  
few Gb of images, takes forever (hours).

Of curse, I am experiencing similar issues with the other Open Source  
Software, for example for video editing, so I am thinking of having a  
small workstation that allows me to enjoy the process, rather than  
drawn in frustration.

I am wondering whether the best solution for digikam is a Ryzen, or a  
Threadripper, and which one of the two is best suited for an improved  
workflow. Of course I am thinking of providing it with adequate  
memory,m and faster SSD as well.

Kind Regards

Quoting Warren Baird <warren at warrenbaird.ca>:

> Are there specific tools you are using that are problematic? and on  
> what size of image?
>
> I've got a somewhat older high-end ryzen - a Ryzen 9 5950X, and on a  
> 30Mpx image, most of the tools I tried were so instantaneous I  
> couldn't see any CPU usage.   I tried a 'noise reduction', and that  
> took a few seconds, and seemed to be making pretty good usage of all  
> cpus.
>
> I have no idea how that would scale to a threadripper though...
>
> If you want to send me an image, and a couple of tools you'd like to  
> see the performance of, I'm happy to try it out and let you know how  
> it works on my machine.
>
>
> On 2025-02-26 16:37, support at hausoos.com wrote:
>>
>> Dear all,
>>
>> Thank you for your helpful answers.
>>
>> I think what I like to understand is whether any of you out there  
>> have tried Threadripper vs. Ryzen, or whether you have any  
>> recommendations, and whether you had noticed substantial  
>> improvements in performances, particularly with using tools in the  
>> image editor, which is where I have the major issues with my  
>> current Intel i7 based system.
>>
>> Kind Regards
>>
>>
>>
>> Quoting Hans-Peter Huth <hans-ph at web.de>:
>>
>>> On Wed, 26 Feb 2025 16:53:50 +0100
>>> Gilles Caulier <caulier.gilles at gmail.com>
>>> wrote:
>>>
>>>> Hi,
>>>>
>>>> This will not make a difference. digiKam will detect the number of core
>>>> available and use multithreading/multicore at computation time. It's fully
>>>> transparent of the architecture / operating system / hardware.
>>>>
>>> i believe single-core performance still matters, RAW development seems to
>>> mostly use only one core. Don't know if there is a difference between the
>>> CPUs in this respect.
>>>
>>> HP
>>>>
>>>
>>>
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>>> (Nero Wolfe)
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>>
>>