[gnutls-help] gnutls + courier-imap => very slow

Lenz Weber mail at lenzw.de
Fri Jan 10 13:43:38 CET 2014

Thanks for the input,
I found it:

It's a bug that apparently was fixed somewhere between
libgnutls26_2.12.14 (which the ubuntu deb is based on) and
libgnutls26_2.12.23 (the latest release in the 2.12 branch).

The newer version takes 1.5 seconds, acually using ~80% cpu, which looks

Is the 2.12 branch still safe to use? Compiling 3.* has dependencies
that Ubuntu LTS cannot fullfill.


On 10.01.2014 08:11, Nikos Mavrogiannopoulos wrote:
> On 01/10/2014 03:20 AM, Lenz Weber wrote:
>> Hello,
>> I'm currently investigating some serious performance problems when using
>> courier-0.66.1ubuntu4 in combination with
>> gnutls-3.0.11+really2.12.14-5ubuntu3.5, which would be the usual
>> combination if one were to compile courier using the --with-gnutls
>> config flag in the lastest Ubuntu LTS version 12.04.
> Please try with an "official" gnutls version before reporting here
> any issue. The ubuntu packages may contain bugs that don't exist in
> the released versions. Try 3.1.18 or better 3.2.8. The latter should be
> faster than openssl not slower.
> regards,
> Nikos

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