misc: Notes

Author: EdCaunt

devito/ir/clusters/algorithms.py

@@ -157,6 +157,7 @@ def callback(self, clusters, prefix, backlog=None, known_break=None):
         # parallelism
         for i in range(1, len(clusters)):
             # FIXME: This eats a lot of time (four seconds each time)
+            # FIXME: Pull scope out of this
             if self._break_for_parallelism(scope, candidates, i):
                 return self.callback(clusters[:i], prefix, clusters[i:] + backlog,
                                      candidates | known_break)
@@ -194,6 +195,7 @@ def _break_for_parallelism(self, scope, candidates, i):
         # break parallelism
 
         # TODO: Can this loop be made to short-circuit?
+        # TODO: Most of the time is burned in d_from_access_gen
         test = False
         for d in scope.d_from_access_gen(scope.a_query(i)):
             if d.is_local or d.is_storage_related(candidates):

devito/ir/support/basic.py

@@ -1170,6 +1170,7 @@ def d_from_access_gen(self, accesses):
         Generate all flow, anti, and output dependences involving any of
         the given TimedAccess objects.
         """
+        # FIXME: This seems to be a hotspot
         accesses = as_tuple(accesses)
         for d in self.d_all_gen():
             for i in accesses: