Increase the max_ratio of equilibrium

My optimization pushes in the main graph a lot of computations in terms of constants, and constant folding maxes out pretty quickly. This is a quick fix to that. I'm not sure if 50 is not too much, I haven't played with that value .. maybe 20 or something would suffice. I would also like to increase this value only for constant folding and not all the others, but I didn't know how.

Increase the max_ratio of equilibrium
dcc5c958 · Razvan Pascanu · a0aee682 · dcc5c958
--- a/theano/gof/optdb.py
+++ b/theano/gof/optdb.py
@@ -168,7 +168,10 @@ class EquilibriumDB(DB):
        opts = super(EquilibriumDB, self).query(*tags, **kwtags)
        return opt.EquilibriumOptimizer(opts,
                max_depth=5,
-                max_use_ratio=11,#upgraded to 11 to don't generated useless output in test.
+                max_use_ratio=50,#upgraded to 50 to avoid equibriumOptimizer
+                                # to be max'ed out by constant folding (can
+                                        # I increase the max ratio only for
+                                        # constant folding somehow?
                failure_callback=opt.NavigatorOptimizer.warn_inplace)