[gnutls-dev] Work in progress: GnuTLS 2.2 release notes on API changes
simon at josefsson.org
Sun Nov 18 09:19:59 CET 2007
Nikos Mavrogiannopoulos <nmav at gnutls.org> writes:
> On Thursday 15 November 2007, Simon Josefsson wrote:
>> I think it would be better if we had a function like:
>> int gnutls_set_priority (gnutls_session_t session,
>> const char *priority);
> I just remembered that there was a reason this priority function was kept
> simple from the begging (integers only). This function is called per session,
> thus having a parsing routing like this would add some overhead... This could
> be insignificant compared to RSA/DH etc, but still in a busy server it might
> become significant.
Ah, I understand.
> What I had thought then was to make this parsing routine output the result
> in a gnutls_priority_st structure and then associate this struction with every
> session. If found that solution complex then...
How about implementing the simple gnutls_set_priority function now, and
if it turns out that it is actually a performance bottle-neck for some
applications, we can add a gnutls_parse_priority and a new
gnutls_set_preparsed_priority function to handle that. I think for 90 %
of the applications, the inefficiency doesn't matter. Premature
optimization is the root of all evil etc...
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