title: AOSP build with fastest emulator boot
body: <p>Which android build target results in the shortest emulator boot time on a mac?</p>
  
  <p>Context: I am debugging a UI issue in the android framework. Building and deploying the framework is reasonably fast, but waiting for the emulator to reboot is painful. My machine is a mac with Yosemite. Given my framework focus, I care much more about speed than the build target.</p>
  
  <p>Which of the available targets will result in the fastest boot?</p>
  
  <pre><code>You're building on Darwin
  
  Lunch menu... pick a combo:
       1. aosp_arm-eng
       2. aosp_arm64-eng
       3. aosp_mips-eng
       4. aosp_mips64-eng
       5. aosp_x86-eng
       6. aosp_x86_64-eng
       7. aosp_deb-userdebug
       8. aosp_flo-userdebug
       9. full_fugu-userdebug
       10. aosp_fugu-userdebug
       11. aosp_grouper-userdebug
       12. aosp_tilapia-userdebug
       13. mini_emulator_arm64-userdebug
       14. mini_emulator_arm-userdebug
       15. mini_emulator_mips-userdebug
       16. mini_emulator_x86-userdebug
       17. mini_emulator_x86_64-userdebug
       18. aosp_flounder-userdebug
       19. aosp_hammerhead-userdebug
       20. aosp_mako-userdebug
       21. aosp_shamu-userdebug
       22. aosp_manta-userdebug
  
  Which would you like? [aosp_arm-eng] 
  </code></pre>
  
  <p>So far I have tried aosp_x86_64-eng which is reasonable, and aosp-arm-eng which is painfully slow. Wondering about the impact of the various x86 options, -eng vs -user vs -userdebug, etc.</p>
  
  <p>I'm also wondering if there are key emulator command line options that help. -memory is obvious, but the impact of things like -accel are not.</p>