Summary:
The documentation is still somewhat vague on the best use of the "HardwareAccel" option.
HardwareAccel 0|1

If non-zero, try to use built-in (static) crypto hardware acceleration when available. (Default: 0)

I could not find a definitive answer in the archives or in https://gitweb.torproject.org/tor.git/log/?qt=grep&q=hardwareaccel&showmsg=1.

https://www.torservers.net/wiki/setup/server#aes-ni_crypto_acceleration claims no intervention is needed in regards of aes-ni accelaration, but I would like to add an explanation or source to this recommendation.

Question_1:
If my CPU supports and have loaded aesni_intel on linux with OpenSSL is 1.0.1.j-1, should I leave HardwareAccel off or explicitly enable it?

Question_2:
What does "built-in (static) crypto hardware acceleration" refer to? Dedicated hardware, CPU-support or...?

Best regards