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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. 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 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: And their configure parameters: 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?
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