Hi all.
Is anyone else seeing issues with OpenSSH being slow on OSX High
Sierra? In the interests of better test coverage I set one up,
however the OpenSSH tests take much longer on it than on much older
machines with much slower CPUs. It seems to be due to the
vendor-supplied libcrypto being about 20x slower at bignum operations
than nominally the same version of LibreSSL compiled locally.
If anyone has such a machine handy, could you please run "sysctl
machdep.cpu.brand_string; /usr/bin/openssl speed rsa" and post the
results for comparison?
$ uname -a
Darwin osx-highsierra 17.6.0 Darwin Kernel Version 17.6.0: Tue May 8
15:22:16 PDT 2018; root:xnu-4570.61.1~1/RELEASE_X86_64 x86_64
$ sysctl machdep.cpu.brand_string
machdep.cpu.brand_string: Intel(R) Core(TM) i5-2415M CPU @ 2.30GHz
$ /usr/bin/openssl speed rsa
[...]
LibreSSL 2.2.7
built on: date not available
options:bn(64,64) rc4(ptr,int) des(idx,cisc,16,int) aes(partial) blowfish(idx)
compiler: information not available
rsa 512 bits 0.000964s 0.000059s 1037.3 16987.1
rsa 1024 bits 0.006052s 0.000271s 165.2 3687.3
rsa 2048 bits 0.040528s 0.001145s 24.7 873.6
rsa 4096 bits 0.278889s 0.004272s 3.6 234.1
$ libressl-2.2.7/apps/openssl speed rsa
[...]
options:bn(64,64) rc4(16x,int) des(idx,cisc,16,int) aes(partial)
idea(int) blowfish(idx)
compiler: information not available
sign verify sign/s verify/s
rsa 512 bits 0.000074s 0.000008s 13466.5 130066.4
rsa 1024 bits 0.000271s 0.000017s 3690.6 57557.5
rsa 2048 bits 0.001665s 0.000054s 600.6 18684.4
rsa 4096 bits 0.011938s 0.000195s 83.8 5121.7
--
Darren Tucker (dtucker at dtucker.net)
GPG key 11EAA6FA / A86E 3E07 5B19 5880 E860 37F4 9357 ECEF 11EA A6FA (new)
Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.
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