A metatable in Lua defines various extraneous behaviors for a table when indexed, modified, interacted with, etc. They are Lua's core metaprogramming feature; most well known for being useful to emulate classes much like an OOP language.
Any table (and userdata) may be assigned a metatable. You can define a metatable for a table as such:
-- Our sample table
local tab = {}
-- Our metatable
local metatable = {
-- This table is then what holds the metamethods or metafields
| https://stackoverflow.com/questions/37063267/high-cpu-usage-with-android-emulator-qemu-system-i386-exe | |
| The cause of the constant CPU usage is the sound. If you do not need sound in your emulator you can disable it by editing the AVD's config file. | |
| Change/add those two lines | |
| hw.audioInput=no | |
| hw.audioOutput=no | |
| On Linux/Mac the file is located at ~/.android/avd/<AVD_Name>.avd/config.ini | |
| On Windows the file is located at C:\Users\<username>\.android\avd\<AVD_Name>.avd\config.ini |