I'm getting 0.5fps with Safari Technology Preview, and a smooth 60fps with the stock Safari. I'm wondering what's up with that? I've tried both with and without

I'm getting 0.5fps with Safari Technology Preview, and a smooth 60fps with the stock Safari. I'm wondering what's up with that? I've tried both with and without the relevant entries I could find in "Experimental features" (WebGL 2.0, WebGPU, and something I forgot)