Hide callbacks detail if they are fast.

theano/gof/opt.py

@@ -658,6 +658,7 @@ class MergeOptimizer(Optimizer):
         print >> stream, blanc, "  replace_time", replace_time
         print >> stream, blanc, "  validate_time", validate_time
         print >> stream, blanc, "  callback_time", callback_time
+        if callback_time > 1:
             print >> stream, blanc, "  callbacks_time"
             for i in sorted(callbacks_time.iteritems(), key=lambda a: a[1]):
                 if i[1] > 0:

theano/tensor/blas.py

@@ -1581,6 +1581,7 @@ class GemmOptimizer(Optimizer):
         print >> stream, blanc, " time_toposort", prof[9]
         print >> stream, blanc, " validate_time", prof[10]
         print >> stream, blanc, " callback_time", prof[11]
+        if prof[11] > 1:
             print >> stream, blanc, " callbacks_time"
             for i in sorted(prof[12].iteritems(), key=lambda a: a[1]):
                 if i[1] > 0:

theano/tensor/opt.py

@@ -4941,6 +4941,7 @@ class FusionOptimizer(Optimizer):
         print >> stream, blanc, " nb_inconsistency_replace", prof[3]
         print >> stream, blanc, " validate_time", prof[4]
         print >> stream, blanc, " callback_time", prof[5]
+        if prof[5] > 1:
             print >> stream, blanc, " callbacks_time"
             for i in sorted(prof[6].iteritems(), key=lambda a: a[1]):
                 if i[1] > 0: