There is a supposefd tweak accessed by dialing the a code to access hidden menus. These tweaks turn on Temperature and monitoring daemons which throttle the CPU. I tried the setting and found the smartphone heat up and close down.
The recommendation for speed is keep the phone up to date，keep screen on auto，clear out temp files. And wait for updates from LG. Messing with hidden settings can damage your phone or damage the config of Android.