[4.3.0.12] SFOS 4.3 extremely laggy on Xperia X - many delays and hangs

REPRODUCIBILITY (% or how often): 80%
BUILD ID = OS VERSION (Settings > About product): 4.3.0.12
HARDWARE (XA2, X10, X10 II, …): Xperia X
UI LANGUAGE: German
REGRESSION: (compared to previous public release: Yes, No, ?): Did not happen on previous versions

DESCRIPTION:

  1. Noticeable general delays when using the device (even simple swipes hang).
  2. Screen regularly hangs while typing. I can keep typing multiple words on the frozen screen and my input will be processed many seconds after. (When this happens I can still swipe away the app and “go elsewhere”.)
  3. When hitting the paper clip in an Android app, it takes 7 seconds until images/videos are shown for selection. 100% reproducible

Note that there is no noticeable extra battery consumption experienced (compared to previous versions).

PRECONDITIONS:

Updated from 4.1 to 4.2 to 4.3

STEPS TO REPRODUCE:

  1. Use the phone

EXPECTED RESULT:

A reasonable usable phone with no lags

ACTUAL RESULT:

Annoying halts and lags

ADDITIONAL INFORMATION:

Screenshots wouldn’t help. Let me know which logs would.

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