I (work at HeadSpin) did some analysis of PG&E Web Browser performance on HeadSpin using real mobile devices and found the following API call to be unresponsive or very slow. When the API succeeds, the response was 4.6MB JSON.
http://outages-prod.elasticbeanstalk.com/cweb/outages/getOutagesRegions?regionType=city&expand=true&ts=1572194037
HeadSpin Mobile Performance Session
https://ui-dev.headspin.io/sessions/7f841f6d-f8d7-11e9-9b52-021637a61100/waterfall
Linkedin Post that I did with screenshots:
https://www.linkedin.com/posts/wmaiouiru_hello-pacific-gas-and-electric-company-we-activity-6594269696542023680-_AbY
HeadSpin Mobile Performance Session https://ui-dev.headspin.io/sessions/7f841f6d-f8d7-11e9-9b52-021637a61100/waterfall
Linkedin Post that I did with screenshots: https://www.linkedin.com/posts/wmaiouiru_hello-pacific-gas-and-electric-company-we-activity-6594269696542023680-_AbY