I haven't measured exactly but, for the CPU and time shown on that page, it looks to be about 10-20 times slower than my rtx4090 which is much faster (less slower) than I would have expected.

A SDXL 1024x1024 high quality image generation takes between 5-15 seconds on an RTX3090 depending on your scheduler. I haven’t tried the older SD1.x/2.x or lower resolution models but I’m assuming they’d be quite a bit faster.