Opening a .RAF Fujifilm RAW Image is slow 3-6 Seconds
Opening a RAW image is rather slow on my 2011 MacBook Pro 17", 16GB RAM, Intel® Core™ i7-2860QM × 8, Graphics: Mesa Intel® HD Graphics 3000 (SNB GT2) / AMD TURKS, running Ubuntu 22.10, External HDD Spinning Disk over Thunderbolt 2, Gthumb v3.12.2, Fujifilm Raw Image Files *.RAF, Size 60-120MB each file, HDD to PC Mixed Read/Write Speed 57MB/Second, Read Speed 130MB/Second.
I notice for example that RAW thumbnail opening of the same file in MacOS using the same hardware/software from ~2011, and default file/image viewer is much faster (still not instant, but at least 2x faster). In Linux with GThumb, it takes about 6 seconds for one selected thumbnail image to open fully.
I believe MacOS may do partial image loads and fills in the blanks after the image is loaded at full resolution, so that it appears to the user it is loaded but when you zoom in you can see the resolution updates after a while.
Based on the available sustained read speed of my computer at least it should be able to fully read each image's data in less than 1second, which means the processing time is ~5seconds, which also seems high.
Similar to Issue #80