It seems like a change we did between the 2->3rd September increased the domComplete time on mobile (domInteractive looks ok that's good):
When I check WebPageTest it seems we load 5 more images by default for Barack Obama:
You can check before and after here in WebPageTest.
It also looks like the SpeedIndex got higher:
The changes in the server log that has something to do with mobile (the first one looks suspicious):
00:02 logmsgbot: dereckson@tin Synchronized php-1.28.0-wmf.17/extensions/MobileFrontend/resources/mobile.startup/Skin.js: Ensure lazy image placeholders without height can be loaded (T143768) (duration: 00m 46s) 00:13 logmsgbot: dereckson@tin Synchronized wmf-config/InitialiseSettings.php: End lazy loading reference experiments (T144240) (duration: 00m 47s)
@Jdlrobson do you know if this is intentional?