mean.md

Put this in your /boot/firmware/usercfg.txt

# [GPU]

# underclock gpu
core_freq=50

# [CPU]

# unlock cpu
force_turbo=1

# avoid gpu/cpu scale sharing
avoid_pwm_pll=1

# overclock cpu
arm_freq=1400

# overvolt for cpu
over_voltage=6

# [SD]

# unlock sd rate
sdram_schmoo=0x02000020

# overclock sdram
sdram_freq=600

# overvolt sd
over_voltage_sdram_p=6
over_voltage_sdram_i=6
over_voltage_sdram_c=6

# overclock sdcard interface
dtoverlay=sdhost,overclock_50=100

# [Misc]

# audio off
dtparam=audio=off

# delay overclock during boot to prevent sd card corruption
boot_delay=1

# disable splash on boot
disable_splash=1

# temperature safeguard
temp_limit=85

as well as putting this line into the end of /boot/firmware/config.txt

gpu_mem=16

reboot and enjoy faster rpi

sudo shutdown -r now