OpenSSL 1.1.1g Windows build slow rsa tests

[Dan Heinz]

Hello,

I'm building openssl 1.1.1g  on multiple platforms and I found that the rsa speed tests are significantly slower in my build than on the other OS platforms (Linux and macOS).

I downloaded a Windows 64-bit binary distribution of openssl from https://kb.firedaemon.com/support/solutions/articles/4000121705 as they include the configure parameters used for their build.
I ran the speed rsa tests on their openssl Windows 64-bit binary and they were much faster than the tests on my build.

Here's some output.
My openssl binary executed with openssl speed rsa:
Doing 2048 bits private rsa's for 10s: 409 2048 bits private RSA's in 10.00s
Doing 2048 bits public rsa's for 10s: 15663 2048 bits public RSA's in 10.02s
Doing 4096 bits private rsa's for 10s: 60 4096 bits private RSA's in 10.00s
Doing 4096 bits public rsa's for 10s: 4316 4096 bits public RSA's in 10.02s
OpenSSL 1.1.1g  21 Apr 2020
built on: Wed Jan 20 18:38:14 2021 UTC
options:bn(64,64) rc4(int) des(long) aes(partial) blowfish(ptr)
compiler: cl /Fdossl_static.pdb  /Gs0 /GF /Gy /MT /Zi /W3 /wd4090 /nologo /O2 -DL_ENDIAN -DOPENSSL_PIC -DOPENSSL_NO_DEPRECATED
                  sign    verify    sign/s verify/s
rsa 2048 bits 0.024450s 0.000639s     40.9   1563.9
rsa 4096 bits 0.166667s 0.002321s      6.0    430.9

Here is the downloaded binary from https://kb.firedaemon.com/support/solutions/articles/4000121705:
Doing 2048 bits private rsa's for 10s: 1622 2048 bits private RSA's in 10.02s
Doing 2048 bits public rsa's for 10s: 72622 2048 bits public RSA's in 10.00s
Doing 4096 bits private rsa's for 10s: 255 4096 bits private RSA's in 10.03s
Doing 4096 bits public rsa's for 10s: 18976 4096 bits public RSA's in 10.00s
OpenSSL 1.1.1j-dev  xx XXX xxxx
built on: Wed Jan  6 11:11:12 2021 UTC
options:bn(64,64) rc4(int) des(long) aes(partial) idea(int) blowfish(ptr)
compiler: cl /Zi /Fdossl_static.pdb /Gs0 /GF /Gy /MD /W3 /wd4090 /nologo /O2 -DL_ENDIAN -DOPENSSL_PIC -DOPENSSL_NO_DEPRECATED
                  sign    verify    sign/s verify/s
rsa 2048 bits 0.006175s 0.000138s    161.9   7262.2
rsa 4096 bits 0.039338s 0.000527s     25.4   1897.6

That is a little over 4 times faster.

Here are my configure parameters:
Configure VC-WIN64A no-shared  no-asm no-idea no-mdc2 no-rc5 no-ssl2 no-ssl3 no-zlib no-comp no-pinshared no-ui-console  -DOPENSSL_NO_DEPRECATED --api=1.1.0

And their configure parameters:
Configure VC-WIN64A no-asm no-ssl3 no-zlib no-comp no-ui-console --api=1.1.0 --prefix="%openssl-dst%" --openssldir=ssl -DOPENSSL_NO_DEPRECATED

Both my build and theirs are built with Visual Studio 2015.
Any ideas why my build is so much slower?  Is there something in my configuration that might cause this?



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mta.openssl.org/pipermail/openssl-users/attachments/20210120/2e00e174/attachment.html>