Performance issues when uploading many photos to folder - too many previews are generated parallel

I’m running NC24 as snap on an Intel NUC with 4-Core i5 and 6GB Ram.
When uploading some (100+) photos to a folder the preview generator seems to generate 20+ previews at the same time, maxing out my cpu and ram. The system gets very slow and upload of the photos may fail with a webserver timeout error.
Can i somehow throttle preview generation? I don’t want to turn it off but limit generation to - say 3 parallel processes so there is always 1 core left for handling the upload and serving the site…