gnutls26 insanely slow on m68k (compared to openssl)

[Simon Josefsson]

Andreas Schwab <schwab at linux-m68k.org> writes:

> Thorsten Glaser <tg at mirbsd.de> writes:
>
>> Dixi quod…
>>
>>>‣‣‣ wget 1.14-1 (gnutls26)
>>>libgnutls26_2.12.7-4		⇒ 45s (via LD_PRELOAD)
>>>ii libgnutls26:m68k  2.12.20-2	⇒ 64s
>>>‣‣‣ wget 1.12-5 (openssl)
>>>ii libssl1.0.0:m68k  1.0.1c-4	⇒ 1s
>>>
>>>Now that is a *noticeable* difference, even, granted, when the two
>>>servers (https://www.mirbsd.org/ and https://evolvis.evolvis.org/)
>>>have both 4096-bit RSA certificates.
>>
>> Hi again, any idea how this can be debugged?
>
> Perhaps gnutls is just using different (more expensive) defaults?

Can you try using gnutls-cli to see if the slowness is in the handshake
or the transfer or something else?  Most benchmarks I've done and read
indicate GnuTLS is comparable to OpenSSL in speed -- there are no
dramatic differences, and each have better performance in some areas.

The reason for a 64-time slowdown is likely a non-crypto bug somewhere.

/Simon