android traceview

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

Answer 2

1) Try this answer to make drawBitmap less expensive

2)VM-specific debug features. Though this class and many of its members are public, this class is meant to be wrapped in a more friendly way for use by application developers. On the Android platform, the recommended way to access this functionality is through the class android.os.Debug.

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