Very high CPU usage when showing 2 images side-by-side in Preview

[rwcope2]

I just downloaded a trial of the Photo Mechanic Plus version 2025.6, build 8622 (I currently own version 6), and I noticed that if I show 2 images side-by-side in the preview, CPU usage spikes on my 2024 M4 MacBook Pro (16GB RAM). Activity Monitors shows CPU usage of Photo Mechanic at 800% (!?!).  When I switch back to showing a single image, CPU usage returns to normal.

Just thought I would mention it.  Happy to provide other info if needed.

Rob

[Kirk Baker]

Rob,

How many photos are in the Contact Sheet?  Are you moving through the images or just viewing the same two images for a period of time?

-Kirk

[rwcope2]

There are 1400 images in the contact sheet.  The high CPU usage happens after I have been moving through images.

[Kirk Baker]

There are 1400 images in the contact sheet.  The high CPU usage happens after I have been moving through images.

And if you stop moving, the CPU usage never decreases?

-Kirk

[rwcope2]

And if you stop moving, the CPU usage never decreases?

-Kirk

The longest I stopped moving was 2 or 3 minutes, and in that time the CPU usage remained high.  Going to single image view brought CPU usage down within 30 seconds.

[Kirk Baker]

OK, one last question: were you viewing images side-by-side, or with one image at the top and one on the bottom?

We'll investigate and if we can reproduce the problem, we'll fix it.

That said, PM does a lot of pre-caching to keep responsiveness high and it will work on several images in the direction that you're moving through images.

-Kirk