Photoshop Beta Version Comments and Query

I downloaded and am using the most recent Photoshop Beta Version and I must say that I am noticing a noticeable improvement - it is somehow smoother, and responds faster in most of the commands.

I look forward to having the full version.  Congrats to the team!

I would like to ask a question I have been having on my imac whilst post processing on any version of Photoshop - maybe someone can assist me improve this problem of mine:

I use an imac 3.6 GHz 8-Core Intel Core i9 with a Radeon Pro 575X 4 GB graphic card + 64 GB 2667 MHz DDR4 Ram.

I am a photographer by profession and when I load more than 20 or so images for post processing and resizing everything slows down re:  resizing tool, etc.  I know I am loading it quite a lot and I do think it has to do with the graphic card.

Can I have adjust some settings which maybe can help?

Cheers and thanks

DA