We are working on this issue. This thread is for people who have experienced a dramatic slowdown in SkyDemon since our version 3.6.2. We will release a series of build on this thread testing a few changes until we discover what the cause is/was and find a way to work around it.

The first build is at the link below. It is our 3.6.2 version built with current tools. We expect it to have high performance, and the purpose of the build is to prove (to ourselves) that is isn't the build tools, and that it's something within the SkyDemon code over which we have control.

http://www.skydemon.aero/extras/aero.skydemon.skydemonandroid.362newtools.apk

The next build is available for test:

http://www.skydemon.aero/extras/aero.skydemon.skydemonandroid.test1.apk

This is 3.6.3 with various reversions to 3.6.2 (including the version information, so it will report 3.6.2) but most features from 3.6.3 intact. In my own tests I expect this build to still perform with the speed of 3.6.2. Some stuff might be broken, but that's the nature of this process.