Shotwell is sluggish previewing large JPEG 12000 x 9000
Mandatory: Shotwell version the issue was seen with
0.30.10 – “Celle”
The expected behaviour
More responsive preview.
I am running on NVMe SSD on Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz with 2 OpenCL capable graphic cards.
The CPU load goes about 22% when doing this. I shoot this using my SAMSUNG U20. It would be nice to optimize Shotwell because camera that gives resolution of that size will be more and more common. I haven't read the code but there are probably ways to optimize this using the GPU.
What was actually happening
When looking at 12000 × 9000 37MB JPEG, it takes several seconds for the shot to appear with some quality
Steps to reproduce the issue
Load a 12000 x 9000 JPEG. Click on it. Wait several seconds before having quality.