I’ve actually figured out that it’s caused by having the in game vsync turned on. When disabled it’s fine, but I’m not sure why it’s causing an issue as I’m also using freesync.

Do you also have the issue with D4 where the in game menus are laggy when opened? For me the GPU hits 100% usage and the fps drops. Once I close the menus/inventory it’s fine.

Here is an updated shreddit written in rust. https://github.com/andrewbanchich/shreddit. I used it yesterday and it worked. The only issue is it seems to only process 25 entries at time so you need to run the code in a loop. In bash you can do something like: while :;do ./shreddit args;done and kill it once it completes.