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Re: [Monotone-devel] Re: sha1/botan stuff
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From: |
Florian Weimer |
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Subject: |
Re: [Monotone-devel] Re: sha1/botan stuff |
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Date: |
Fri, 11 Aug 2006 18:13:35 +0200 |
* Nathaniel Smith:
> At a cursory glance, gcrypt's implementation looks just the same as
> all the others; I don't know what makes it so fast.
Have a look at bithelp.h, it forces the use of bit rotation opcodes on
x86. While GCC's peephole optimization catches that as well, the
machine code insertion might result in some scheduling differences.
- Re: xdelta speedups (was Re: [Monotone-devel] updates to net.venge.monotone.experiment.performance), (continued)
[Monotone-devel] Re: sha1/botan stuff, Jack Lloyd, 2006/08/12