Good news though! The Trim command is now supported in Android 4.3. This means the new Nexus 7 won’t have this performance issue and the older Nexus 7 will work much better once it has been updated to the latest version of the OS.
According to reports coming from AnandTech, Android 4.3 will run this command once a day providing the device is idle, the display is turned off, and the battery is above 70 percent. So, for those of you who have upgraded your old Nexus device, you won’t magically see a performance boost as soon as you install it. Instead, plug in your device; leave it idle for a few hours, and voila!