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Building Canon/Fuji previews mystery

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gYab61zH

Active Member
Joined
Aug 12, 2011
Messages
263
Location
Germany
Lightroom Experience
Advanced
Lightroom Version
Lightroom Version Number
11.4
Operating System
  1. macOS 12 Monterey
Hi,

Does anyone know why it takes LR so long to build Fuji previews (XT4 26Mp raw files) as compared to Canon R5 (45mp raw). The Canon files are much larger and yet building previews finishes a lor quicker (matter of perhaps 10-15 minutes for over 2000 files) whereas 500 Fuji files take forever (more than an hour).

PS. I just checked Activity Monitor on my Intel 10 core i9 iMac and it puts Lightroom at the top of the CPU list with over 1840 %CPU. It's too late now to check how high it was when it was rendering the Canon files but I bet it was dramatically lower.
 
Last edited:
What type of preview are you building: Standard, 1:1 or Smart?

Are the images already edited or unedited?
 
Standard. The images are unedited (they have just been imported from sd card). I can confirm that LR has now spent > 2 hours on the Fuji images and isn't even half way.
 
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