Add benchmark for "..." in graph.modules

In the rust backed implementation this is significantly slower
(currently), so lets add a benchmark to track this.

tests/benchmarking/test_benchmarking.py

@@ -44,7 +44,6 @@ def large_graph():
     f"{DEEP_PACKAGE}.application.3242334296.2454157946",
 )
 
-
 TOP_LEVEL_PACKAGE_DEPENDENCIES = {
     PackageDependency(
         importer="mypackage.domain",
@@ -423,3 +422,11 @@ def test_no_chains(self, large_graph, benchmark):
 
 def test_copy_graph(large_graph, benchmark):
     _run_benchmark(benchmark, lambda: deepcopy(large_graph))
+
+
+def test_graph_contains_module(large_graph, benchmark):
+    def f(n):
+        for i in range(n):
+            _ = f"foo{i}" in large_graph.modules
+
+    _run_benchmark(benchmark, f, 100)