tuneup: speed_measure() could not get 4 results within 1.0%

[Torbjörn Granlund]

Nikita Zlobin <nick87720z at gmail.com> writes:

  There is issue with tune system. I tried to compile from sources and
  tune on two laptops, one with intel b950, seconf - i5 (don't remember
  exact cpu number), both sandybridge (i5 - with avx).

We are aware of that tuning of the various GCD thresholds don't work
properly.  This has been broken for a very long time.  I have not spent
enough time on it to understand why it does not work.  If somebody else
could do that, it would be very good.

-- 
Torbjörn
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