This happens on macOS 12 with an image created using -[NSImage lockFocus], depending on what the main display is.
This makes me wonder why MTKTextureLoader exists. It would be a nice convenience if it worked reliably.
gnachman
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Great idea, that's exactly what I needed. Looks like enabling cores 0-21 gives the best performance, which is approximately the same as the laptop.I agree with the theory that I’m RAM bound, since there really isn’t anything else left to contend over. I only have DIMMs in half the slots. I wonder if I could double my memory bandwidth by installing six more?