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Android Development
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Some Sample Performance Numbers

To illustrate some of our ideas, here is a table listing the approximate run times for a few basic actions. Note that these values should NOT be taken as absolute numbers: they are a combination of CPU and wall clock time, and will change as improvements are made to the system. However, it is worth noting how these values apply relative to each other — for example, adding a member variable currently takes about four times as long as adding a local variable.

Action Time
Add a local variable 1
Add a member variable 4
Call String.length() 5
Call empty static native method 5
Call empty static method 12
Call empty virtual method 12.5
Call empty interface method 15
Call Iterator:next() on a HashMap 165
Call put() on a HashMap 600
Inflate 1 View from XML 22,000
Inflate 1 LinearLayout containing 1 TextView 25,000
Inflate 1 LinearLayout containing 6 View objects 100,000
Inflate 1 LinearLayout containing 6 TextView objects 135,000
Launch an empty activity 3,000,000
Android Development
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