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The logging is almost useless for users but a developer can debug in IDE.
The raw keys bytes are not saying anything.
We have errors to return a message to a caller.
In the same time the code needs to be compiled and it makes the program slower because it resides in CPU cache.
I going to send another PR with a performance improvement and for it I anyway need to broke the logging in some places.
I benchmarked and even when the logging is disabled it still makes code slower because it takes some place in CPU instructions cache.
The PR has some minor refactoring of tests.