Add interface performance benchmark (#2948)

tests/benchmarks/test_execute.py

@@ -1,13 +1,14 @@
 import datetime
 import random
 from datetime import date
-from typing import List
+from typing import List, Type, cast
 
 import pytest
 from asgiref.sync import async_to_sync
 from pytest_codspeed.plugin import BenchmarkFixture
 
 import strawberry
+from strawberry.scalars import ID
 
 
 @pytest.mark.benchmark
@@ -72,3 +73,29 @@ def patrons(self) -> List[Patron]:
     """
 
     benchmark(async_to_sync(schema.execute), query)
+
+
+@pytest.mark.parametrize("ntypes", [2**k for k in range(0, 13, 4)])
+def test_interface_performance(benchmark: BenchmarkFixture, ntypes: int):
+    @strawberry.interface
+    class Item:
+        id: ID
+
+    CONCRETE_TYPES: List[Type[Item]] = []
+    for i in range(ntypes):
+        CONCRETE_TYPES.append(strawberry.type(type(f"Item{i}", (Item,), {})))
+
+    @strawberry.type
+    class Query:
+        items: List[Item]
+
+    schema = strawberry.Schema(query=Query, types=CONCRETE_TYPES)
+    query = "query { items { id } }"
+
+    benchmark(
+        async_to_sync(schema.execute),
+        query,
+        root_value=Query(
+            items=[CONCRETE_TYPES[i % ntypes](id=cast(ID, i)) for i in range(1000)]
+        ),
+    )