Are performance expectations from  tensorflow-metal 0.4.0 and tensorflow-metal 0.5.x documented somewhere?

This is the suggestion: FAQ 2 Note that not all forum features work as expected. Inline images/screenshots are a silent fail, as one example - you can add them...others can't see them. Use your words, or upload to iCloud via Photo Sharing and add the link to your post, or elsewhere and add the (borked) link, instead. from here.