This simply keeps the Raspberry Pi 3 board running at max defaults which are arm_freq=1200 and core_freq=400. The default idle config for the Raspberry Pi 3 board is arm_freq=600 and core_freq=250. The arm_freq setting still adds heat to the board when pushed beyond the default max of 1.2Ghz, so we are not touching that. Therefore, you can reduce lag and improve performance by disabling this CPU scaling feature and forcing the board to always use the default maximums. The Linux kernel ondemand governor used in the Raspberry Pi will increase the CPU speed to the maximum configured default value whenever there’s adequate load.
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