Crypto timings

[Kurt Roeckx]

On Sun, Jan 29, 2017 at 10:44:49PM +0100, Kurt Roeckx wrote:
> On Sun, Jan 29, 2017 at 09:09:56PM +0000, Greg Rubin wrote:
> > Mind running the timings with the legacy interfaces as well?  We may
> > determine that the speed benefits are outweighed by the risks and
> > complexities of an older API, but it would be good to have the data so we
> > can make an informed decision.
> > 
> > https://www.openssl.org/docs/man1.0.2/crypto/md5.html
> > https://www.openssl.org/docs/man1.0.2/crypto/sha.html
> 
> On an i5-2500 @ 3.3 GHz, with openssl 1.0.1t:
> openssl speed md5 sha1:
> The 'numbers' are in 1000s of bytes per second processed.
> type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
> md5              57722.54k   170970.22k   379334.74k   545487.19k   625227.09k
> sha1             67990.28k   189759.61k   407470.34k   571764.74k   649565.53k
> 
> openssl speed -evp md5 sha1:
> type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
> md5              69949.09k   196024.75k   407446.02k   561352.70k   628984.49k
> sha1             67922.42k   189184.53k   407347.80k   571157.85k   649428.99k
> 
> (Note that it changed the order of sha1 and md5, but I've made the order the same)
> 
> Instead with the 1.1.0d version:
> type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes  16384 bytes
> md5             108391.99k   257522.09k   468072.79k   586233.51k   633440.94k   636813.31k
> sha1            105271.81k   253953.34k   485931.43k   629915.65k   688802.47k   693933.40k
> 
> vs:
> type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes  16384 bytes
> md5              56006.90k   165390.34k   372050.26k   541776.48k   626789.03k   631794.35k
> sha1            106968.33k   259511.66k   491601.07k   631022.93k   690307.07k   694250.15k

So in 1.1.0, not using the -evp switch actually makes the MD5 call
use the legacy interface, and you'll get less overhead. Didn't
really look at how things are implemented.


Kurt