A collection of Mac command line commands to measure cpu speed, throttling etc
The best I've seen to measure cpu metrics is the Intel Power gadget (though not a command line utility). It's from Intel so it's supposedly trustworthy.
See: https://software.intel.com/en-...
There are some ways to get metrics from the command line, though they do not offer the details and accuracy of the Intel power gadget.
pmset -g therm
# sample output
# 2019-11-24 15:12:28 +0100 CPU Power notify
# CPU_Scheduler_Limit = 100
# CPU_Available_CPUs = 8
# CPU_Speed_Limit = 100
sysctl hw.cpufrequency
# sample outout, 2.2 ghz processor
# hw.cpufrequency: 2200000000