Hi,
The Reading web team is focusing on performance of the site in one of our
quarterly goals, specially the mobile version to improve the experience of all our users on the least powerful devices.
As part of such goal we've (Baha & Jon) conducted an initial performance audit of the mobile site, where we've discovered a few interesting facts, mostly regarding how images are loading and how they are not cached.
We encourage you to read up the phab task
https://phabricator.wikimedia.org/T105365#1477762 and if it is of your interest try and help us understand the highest impact areas where we'll be able to improve the performance of the site, and technical problems you can foresee in performance profiles of it.
Thanks a lot,
Joaquin