perf: Faster local data comparison using idenitity (#1738)

Author: TrevorBergeron

bigframes/core/local_data.py

@@ -54,8 +54,8 @@ def from_arrow(cls, table: pa.Table) -> LocalTableMetadata:
 
 @dataclasses.dataclass(frozen=True)
 class ManagedArrowTable:
-    data: pa.Table = dataclasses.field(hash=False)
-    schema: schemata.ArraySchema = dataclasses.field(hash=False)
+    data: pa.Table = dataclasses.field(hash=False, compare=False)
+    schema: schemata.ArraySchema = dataclasses.field(hash=False, compare=False)
     id: uuid.UUID = dataclasses.field(default_factory=uuid.uuid4)
 
     @functools.cached_property

tests/unit/test_local_data.py

@@ -64,3 +64,16 @@ def test_local_data_well_formed_round_trip_sliced():
         result.reset_index(drop=True),
         check_dtype=False,
     )
+
+
+def test_local_data_equal_self():
+    local_entry = local_data.ManagedArrowTable.from_pandas(pd_data)
+    assert local_entry == local_entry
+    assert hash(local_entry) == hash(local_entry)
+
+
+def test_local_data_not_equal_other():
+    local_entry = local_data.ManagedArrowTable.from_pandas(pd_data)
+    local_entry2 = local_data.ManagedArrowTable.from_pandas(pd_data[::2])
+    assert local_entry != local_entry2
+    assert hash(local_entry) != hash(local_entry2)