It's definitely not that bad for the Pixel 10. One source[0] shows Geekbench 6 scores of 3701 single core and 9460 multicore for iPhone 17 (maybe add 5% more on each on the iPhone 17 Pro). While the Tensor G5 in the Pixel 10 is at 2345 single/6581 multi. So around 63-70% of the speed of the latest iPhone. Still a pretty poor showing but a far cry from 1/3 the speed.

[0] https://www.tomsguide.com/phones/iphone-17-vs-pixel-10