https://bugzilla.mozilla.org/show_bug.cgi?id=1540135
1540135 - Add a startup mochitest tracking mainthread I/O
RESOLVED (florian) in Firefox - General. Last updated 2019-05-21.
a startupaddtrackingmainthread
https://androidperformance.com/2019/11/06/Android-Systrace-MainThread-And-RenderThread/
Android Systrace 基础知识 - MainThread 和 RenderThread 解读 · Android Performance
Focus On Android Performance
androidsystracemainthreadperformance