[tor-bugs] #8897 [Tor]: Faster curve25519 implementation for ntor

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#8897: Faster curve25519 implementation for ntor
-----------------------------+----------------------------------------
     Reporter:  nickm        |      Owner:  nickm
         Type:  enhancement  |     Status:  needs_review
     Priority:  major        |  Milestone:  Tor: 0.2.5.x-final
    Component:  Tor          |    Version:
   Resolution:               |   Keywords:  tor-relay performance ntor
Actual Points:               |  Parent ID:  #9662
       Points:               |
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Comment (by nickm):

 This and the #9663 changes together save 28% of the runtime for the server
 side of the ntor handshake when built with gcc 4.7 on my 64-bit laptop
 (136 vs 175 usec); 18% when built with clang (177 vs 213 usec); and 22%
 (155 vs 200 usec) when built with gcc 4.2-llvm.  (yeah, yeah, I know, we
 should be using CPU counters.  That's another issue.)

 Note that using a recent gcc gets a pretty big performance boost in and of
 itself with this code.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8897#comment:9>
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