Add/set the following in /boot/config.txt:
# Stops CPU Ramping force_turbo=1 # Helps to avoid SD card corruption from force_turbo boot_delay=1 # Disable Bluetooth & WiFi dtoverlay=pi3-disable-bt dtoverlay=pi3-disable-wifi
Add/Set the following in the /boot/cmdline.txt:
# Turn off dynamic clock ticks nohz=off # Changes the I/O scheduler to noop, which is better for SD cards and flash storage devices. elevator=noop
Change CPU Performance:
apt install cpufrequtils vi /etc/default/cpufrequtils: GOVERNOR="performance"
Reboot & verify the governor setting.