On Wed, Apr 17, 2013 at 12:23 PM, Janusz Dziemidowicz <rraptorr@nails.eu.org> wrote:

2013/4/17 PPingPongBaker PPingPongBaker <ppingpongbaker@gmail.com>:

If you want to compare various stunnel versions, then use the same
OpenSSL version. If you want to compare OpenSSL... then use the same
stunnel version. The configuration you mentioned above doesn't make a
lot of sense as it makes it hard to tell where the performance drop
comes from. If you really must test such configuration, the best way
would be to ensure the same TLS version (1.0, not 1.1 or 1.2, OpenSSL
1.0.1 defaults to 1.2) and the same cipher.

Hi Janusz,

As per your suggestions and mea culpa in some stated results. Here is a hopefully complete/better matrix. Making sure that CPU is pegged at 100% and in stunnel.conf (sslVersion = TLSv1)

stunnel 4.29, OpenSSL 0.9.8o - ~300 requests per sec

stunnel 4.29, OpenSSL 1.0.1e - ~360 requests per sec
stunnel 4.56, OpenSSL 0.9.8o - ~100 requests per sec

stunnel 4.56, OpenSSL 1.0.1e - ~120 requests per sec

Regards.