How to reduce execution time in Android

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http://androidforums.com – I am using Eclipse for Android development and Latest version of Android SDK (Running XP, 2Gb Ram) 1. when run clicked, previously executed emulator appears first then emulator default screen appears, only last current actual output appears 2. when clicked to close takes too much time (2 mns) for the emulator to disapper 3. in short execution time exceeds development/coding time in the testing process is anyway to reduce such execution time thnks in advance (General)