hardware acceleration available for Tor ? On FreeBSD ?

[John Case]

I can see notes like this in the changelog:


Solve a bug that kept hardware crypto acceleration from getting
enabled when accounting was turned on. Fixes bug 907. Bugfix on
0.0.9pre6.


and I can see command line options like:


HardwareAccel 0|1


I would like hardware acceleration for my nodes.  What part or parts are 
known to work well with FreeBSD ?

Any comments on the effectiveness of these parts, and the likelihood that 
they will actually allow a greater network throughput on the same 
underlying cpu(s) and memory, is appreciated.

I have been under the impression that memory is more of a limiting factor 
than cpu - with some estimates being 750-ish megabytes of ram per 
10mbits/s.  I am unsure whether hardware crypto acceleration will decrease 
this memory load, or simply decrease cpu load.
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