[Octave-patch-tracker] [patch #10139] interpreter: static instead of dynamic casts for speed

[Petter Tomner]

Follow-up Comment #2, patch #10139 (project octave):

Ye maybe it could flip from default dynamic to static in a major release or
something. dynamic_cast is surprisingly slow.

I don't think lib users depend on the bad_cast exception, since typeid need to
be messed up somehow for the octave_value object to make the lookup get the
wrong functions (I think).

I look into your feedback at some point. 

I've done a lot of similar speedup patches as a byproduct of a try to make a
stack based interpreter for Octave. Some might be interesting to look at but I
believe a lot breaks lib ABI.

https://savannah.gnu.org/patch/?10167


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