DAX reference to current row value??

Hello!
I can't find a solution for this lilttle problem.
Here is the dataset, it has Units and Performance. I want to make a calculated column with a Maximum Performance for each distinct Unit. (hardcoded here below for example purposes)

Should be smth like this:
maximum = CALCULATE(MAX(table[performance]); table[unit] = ***current unit or what...???***))

Any help is appreciated!