No one cares ?.
I'd suggest you check for alignment issues first as that tends to dominate at small block sizes.
The no one cares is only partly in jest as MD5 is dead, but not yet buried. And in the grand scheme of things even a 2:1 performance hit on 16 byte blocks is unlikely to change the world.
Peter
-----"openssl-dev" <openssl-dev-boun...@openssl.org> wrote: -----
To: openssl-dev@openssl.org
From: Kurt Roeckx
Sent by: "openssl-dev"
Date: 01/30/2017 08:35AM
Subject: [openssl-dev] MD5 speed
From: Kurt Roeckx
Sent by: "openssl-dev"
Date: 01/30/2017 08:35AM
Subject: [openssl-dev] MD5 speed
I had some surprising results of the speed command when testing the
md5 speed on the 1.1.0-stable branch (for both a shared and a static
build):
openssl speed md5 returns:
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes 16384 bytes
md5 115869.46k 268237.29k 473617.41k 589905.92k 636772.35k 639429.29k
openssl speed -evp md5 returns:
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes 16384 bytes
md5 53991.08k 160454.36k 364985.86k 537559.38k 624238.59k 633066.84k
On the other hand, with 1.0.1 and 1.0.2-stable using a static build I get:
md5 38045.25k 123423.76k 310729.30k 505120.09k 620333.74k
md5 43182.80k 135651.38k 331369.48k 518042.97k 622193.32k
Using a shared build I get:
md5 57529.01k 169850.56k 376685.74k 545938.09k 626952.87k
md5 65634.19k 186133.65k 397608.96k 558070.78k 629697.19k
So was surprised me is that speed for small packets seems to be a
lot better in 1.1.0 when not using the EVP interface, but worse when
using it compared to 1.0.2. It this expected behaviour?
Sha1 doesn't seem to have this difference for instance.
Kurt
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md5 speed on the 1.1.0-stable branch (for both a shared and a static
build):
openssl speed md5 returns:
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes 16384 bytes
md5 115869.46k 268237.29k 473617.41k 589905.92k 636772.35k 639429.29k
openssl speed -evp md5 returns:
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes 16384 bytes
md5 53991.08k 160454.36k 364985.86k 537559.38k 624238.59k 633066.84k
On the other hand, with 1.0.1 and 1.0.2-stable using a static build I get:
md5 38045.25k 123423.76k 310729.30k 505120.09k 620333.74k
md5 43182.80k 135651.38k 331369.48k 518042.97k 622193.32k
Using a shared build I get:
md5 57529.01k 169850.56k 376685.74k 545938.09k 626952.87k
md5 65634.19k 186133.65k 397608.96k 558070.78k 629697.19k
So was surprised me is that speed for small packets seems to be a
lot better in 1.1.0 when not using the EVP interface, but worse when
using it compared to 1.0.2. It this expected behaviour?
Sha1 doesn't seem to have this difference for instance.
Kurt
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