Question

I made an application and I wanted to see if I can improve performance by running a traceview on a certain activity + it’s background tasks.

This link points to an image from traceview. As you can see there are 2 colors that are taking the most time + processor.

• The blue color is from drawBitmap. (I use a header logo, a repeating
  header background and another background that repeats over the whole
  screen, all described in XML layout file).
• The green color is something called dalvik/system/VMDebug.startGC ()V

My questions:

1. Can I do something to make this drawBitmap less expensive ? (I would
   however like to keep all images on the screen)
2. What is this VMDebug thing? Can’t seem to find much about it via
   Google

Answer 1

It sounds like you may be able to optimize your bitmap drawing,(you mention a background that is drawn repeatedly)

VMDebug is the dalvik debug monitor
the startGC() function is called to start garbage collection