[FIX] models: performance of mapped is now in O(n) instead of O(n²)

2015-09-04 17:11:57 +02:00
parent ba8ef420eb
commit fa427f15b7
1 changed files with 5 additions and 1 deletions
@@ -5363,7 +5363,11 @@ class BaseModel(object):
        """
        if self:
            vals = [func(rec) for rec in self]
-            return reduce(operator.or_, vals) if isinstance(vals[0], BaseModel) else vals
+            if isinstance(vals[0], BaseModel):
+                # return the union of all recordsets in O(n)
+                ids = set(itertools.chain(*[rec._ids for rec in vals]))
+                return vals[0].browse(ids)
+            return vals
        else:
            vals = func(self)
            return vals if isinstance(vals, BaseModel) else []