Take a look at this talk on why mobile devices are so much slower than desktop devices ( they are indeed 10x slower in the traces I have looked at too) - https://youtu.be/4bZvq3nodf4

Also look at the speedometer benchmark (http://browserbench.org/Speedometer/) for a more realistic comparison of how slow your mobile device is compared to your desktop when running real world apps. Here are some numbers from the benchmark from some devices - http://benediktmeurer.de/2016/12/16/the-truth-about-traditio...