Many LG Phones have a Root Checker Tool which Heavily Slows Down Device Performance

A root checker tool made by LG has been found on several flagship LG devices; it apparently degrades system performance heavily until disabled.

By  Arol Wright Sep 19, 2017

LG once had a mixed stance when it came to modifying their devices, though they've opened up in recent years and now most international LG phones have an easy way to unlock the bootloader. In fact, LG devices are now pretty popular among developers in our forums, with flagship lines having solid custom ROM support. However, for years now the company has been incorporating a root checking tool onto many of their devices, which users on our forums have found to significantly degrade performance until it is disabled.