vietnam mobile day 2013: memory management for android apps
DESCRIPTION
Bài chia sẻ của anh Nguyễn Quốc Việt, Giảng viên Aiti Aptech tại hội thảo Vietnam Mobile Day 2013 tổ chức tại TP.Hồ Chí Minh vào ngày 18/05/2013.TRANSCRIPT
Memory Management For
Android Apps
Who am I ?
Faculty at Aiti-Aptech
Android leader at Zoo Studio
What will I share today ?
Heap size
Garbage Collection
Bitmap management
290 MB
2GB
Heap size
Heap size Limits.
G1 : 16MB
Nexus One : 32MB
Galaxy S3 : 64MB
Heap size
Honeycomb (3.0) support option : “largetHeap” ActivityManager.getLargeMemoryClass()
Garbage Collection
Garbage Collection
Bigger heaps = longer pauses
Pre- Gingerbread Stop all application Pause time > 100ms
Gingerbread and beyond Concurrent Pause times < 5ms
Bitmap
Pre Android 2.3 Freed via recycle() Full, Stop the world GCs
Bitmap
> Android 2.3 Freed synchronously by GC Concurrent & partial GCs
GC_FOR_ALLOC freed <1K, 5% free 4961K/5176K, paused 13ms, total 13ms
GC_CONCURRENT freed 0K, 5% free 4961K/5176K, paused 8ms+0ms, total 10ms
GC_FOR_ALLOC freed 2418K, 45% free 3192K/5788K, paused 1ms, total 1ms
References
http://android-developers.blogspot.com/2011/03/memory-analysis-for-android.html.
http://kohlerm.blogspot.com/2009/02/memory-leaks-are-easy-to-find.html
http://developer.android.com/training/displaying-bitmaps/manage-memory.html