Wow that was quick! Developer "JakeDay" is normally pretty quick to the draw with his stock experience, performance enhanced roms! He is the first to release a rom for the LG G watch which so far appears to be pretty developer friendly.
Features Include:
-improved battery life
-reduced lag between screens
-improved overall performance
-increased vibration intensity
-other surprises
This rom is not to be flashed in recovery like a normal rom. You will need an unlocked bootloader and you will need to have usb debugging installed. Connect watch to PC and simply click the windowns_installer.bat to install. Grab this rom from the link below.
Via Rootzwiki