I'd like to throw my my experience in as well. I just did an upgrade from an i7 2600k (4.4OC) to a Ryzen 2700x hoping to nab some improvement in export time. I frequently export a few hundred images down to medium sizes jpg (2048). I've been doing this for years and while it took a bit on the 2600k I could kick off the export and go do whatever else I wanted on the computer. My last export before upgrading was around a week ago with no issue. Last night I did my first export and not only did my computer become unusable like others have been saying (good luck even moving the mouse) but I think export might have taken longer if not the same amount of time. CPU was pegged at 100% the whole time. I don't understand how this could possibly be. Hopefully it helps others troubleshoot.
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