On Wed, Feb 23, 2022 at 11:11 AM Amos Jeffries <[email protected]> wrote:

> On 23/02/22 13:28, Maamoun TK wrote:
> >
> > Benchmark the implementations on POWER9 and Z15
> >
> *---------------------------------------------------------------------------------------------*
> > |    Arch           |   Nettle patch (radix 2^44)    |   OpenSSL (radix
> > 2^26)   |
> >
> |-------------------|--------------------------------------|-----------------------------------|
> >
> > |   PowerPC    |    0.972 cycles/byte              |    1.453 cycles/byte
> >         |
> >
> |-------------------|--------------------------------------|-----------------------------------|
> > |   IBMz           |    0.840 cycles/byte              |    0.936
> > cycles/byte          |
> >
> *---------------------------------------------------------------------------------------------*
> >
>
>
> What would be more useful here is a column against the non-patched
> Nettle speeds. It is sure nice to see nettle being faster than OpenSSL,
> but what if this proposed change is actually a degrade in current nettle
> speeds on those machines?
>

I've attached a benchmark numbers of these patches against nettle
mainstream that reference C implementation in the merge request
descriptions. There's no drawback here whatsoever.

regards,
Mamone


> Amos
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