[quote name='mingnon;25113]newbie here' date=' can you explain what you said above, but in "newbie" speak[/QUOTE'] I'll try, the Just In Time(JIT) compiler is just another type of compiler. This is one of the key features in 2.2 but the 2.1 has a beta version of it.The performance was measured in Mega FLoatingpoint Operations Per Second hence MFLOPS and the increase is about 18%By using the adb interfaceFirst pull the build.propadb pull /system/build.prop build.propOpen the build.prop as a text file and insert "dalvik.vm.execution-mode=int:jit" in the end of the fileThen push backadb push dalvikvm /system/bin/adb push libdvm.so /system/lib/adb push libnativehelper.so /system/lib/adb shell chmod 755 /system/bin/dalvikvm adb push build.prop /system/adb rebootThis may make your device a little bit unstableGood enough?