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Re: [tor-bugs] #8897 [Tor]: Faster curve25519 implementation for ntor
#8897: Faster curve25519 implementation for ntor
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Reporter: nickm | Owner: nickm
Type: | Status: needs_revision
enhancement | Milestone: Tor: 0.2.7.x-final
Priority: major | Version:
Component: Tor | Keywords: tor-relay, performance, ntor,
Resolution: | 026-triaged-0, 027-triaged-1-in
Actual Points: | Parent ID: #9662
Points: |
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Comment (by yawning):
Has anyone (apart from me) benchmarked this stuff recently in isolation
from #9663?
On a i5-4250U (TurboBoost etc), I get:
* Andrew M. SSE2 (`-O3 -m64 -DCURVE25519_SSE2`): 203194 ticks (clang:
160530 ticks)
* Andrew M. (`-O3 -m64`): 125878 ticks (clang: 136594 ticks)
* agl c64 (`-O3 -m64`): 134442 ticks (clang: 150482 ticks)
This is compiling with gcc 5.1.0, clang 3.6.1. On x86_64 this doesn't
feel worth it at all, especially considering that anyone who cares about
Curve25519 performance is going to probably be hosting a high traffic HS,
and should be on something modern with a 64 bit processor.
How much do we care about 32 bit performance for this sort of thing
anyway?
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8897#comment:21>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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