[gnutls-dev] Re: Gnutls4Win: gnutls_global_init takes > 10 seconds

[Tim Kosse]

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Simon Josefsson wrote:
> It is weird that it takes a long time only on some systems.  I have
> one old Windows 2000 laptop and one Windows XP SP2 desktop, and it
> definitely doesn't take 10 seconds.  Max 2 seconds is more likely.
> I'm curious, how fast is your machine?

It's an IBM Thinkpad R52, 2GHz Pentium M, 1 GB RAM.

Even executing a tiny test program doing nothing else than calling
gnutls_global_init takes 5 seconds, almost exclusively spent in the prng
routines of libgcrypt.
With more complex programs it takes even longer, > 10 seconds if using
GnuTLS in a program using wxWidgets.

libgcrypt queries HKEY_PERFORMANCE_DATA, that alone takes 3-4 seconds.

Furthermore, libgcrypt walks the local heap, which causes the rest of
the delay. Around 1 second for a minimal program and increases if the
program gets more complex. Only limited by the amount of memory which
can be allocated on the heap I think.

Tim
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