small changes to speed up find_MAP (#3916)

Author: tirthasheshpatel

pymc3/tuning/starting.py

@@ -140,11 +140,11 @@ def find_MAP(
             def grad_logp(point):
                 return nan_to_num(-dlogp_func(point))
 
-            opt_result = fmin(cost_func, bij.map(start), fprime=grad_logp, *args, **kwargs)
+            opt_result = fmin(cost_func, x0, fprime=grad_logp, *args, **kwargs)
         else:
             # Check to see if minimization function uses a starting value
             if "x0" in getargspec(fmin).args:
-                opt_result = fmin(cost_func, bij.map(start), *args, **kwargs)
+                opt_result = fmin(cost_func, x0, *args, **kwargs)
             else:
                 opt_result = fmin(cost_func, *args, **kwargs)
 
@@ -174,6 +174,7 @@ def grad_logp(point):
                 assert isinstance(cost_func.progress, ProgressBar)
                 cost_func.progress.total = last_v
                 cost_func.progress.update(last_v)
+                print()
 
     vars = get_default_varnames(model.unobserved_RVs, include_transformed)
     mx = {var.name: value for var, value in zip(vars, model.fastfn(vars)(bij.rmap(mx0)))}