[stunnel-users] Inconsistent performance across stunnel and/or OpenSSL versions

Thu Apr 18 01:46:50 CEST 2013

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

> 2013/4/17 PPingPongBaker PPingPongBaker <ppingpongbaker at 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.
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