I have a Ryzen 5900x, RTX 2070, 32 GB RAM. After the last update, whenever I batch export, it takes a lot of resources to do, like my CPU fan will ramp up disproportionately high for just a batch export for 4 photos that are less than 5 MB each. I usually have Youtube music playing on my other monitor and it will bring Youtube to a stop and I have to reload the page. This even happens after a restart.
I tried exporting a photo at 100 KB to test it, and it was better, but it was still too much resources for a 100KB file