[Qgis-psc] QGIS 2.18 bug fixing effort

[Giovanni Manghi]

> This patch won't affect rendering at all - if you're seeing slower
> rendering after this commit, it's either:
> - an earlier 2.18.8 commit. Possibly the extra safety added by
> https://github.com/qgis/QGIS/commit/452c806670aa31caf0d6ec4e1f308c3d84e6d024,
> but if so I'd choose slower, crash free rendering over crashy
> rendering ;)
> - instability in the benchmark. Can you provide more details about how
> you obtained these figures? Are they averages over multiple runs?


this are my new findings:

https://drive.google.com/file/d/0B8VD1V_leaeWNmpaOFNxZGxicVU/view?usp=sharing

I see clearly that rendering in 2.18.8 from repo is much faster than
in 2.18 compiled from git. Also:

* master is even slower
* the faster of them all was 2.8


cheers!

-- G --