Energy Profiler is one of the tools implemented in Simplicity Studio.
The EFM32 starter kit is equipped with a current sensor that can be used in conjunction with it to measure current at the nA level. The figure below shows the screen during measurement.

Co-verification with source code is also possible.

There is also a function for profiling the power consumption of each function, so if you want to optimize the current consumption, which function is the most efficient to modify? is a clue.

For information on how to use the Energy Profiler, please refer to "6-3 Measuring Current Consumption (Energy Profiler)" in the "EFM32 Quick Start Guide" created by our company.
You can also use the Energy Profiler to measure the current consumption of your board. For details, refer to "6-7 Measuring current consumption of user board" in "EFM32 Quick Start Guide".