add bench

packages/foundation/src/index.ts

@@ -129,7 +129,14 @@ export async function createFoundationSimulationServer<
         });
       }
 
-      return server;
+      return {
+        ...server,
+        ensureClose: () =>
+          new Promise<void>((resolve) => {
+            server.once("close", resolve);
+            server.close();
+          }),
+      };
     },
   };
 }

packages/foundation/tests/examples.bench.ts

@@ -0,0 +1,17 @@
+import { bench, describe } from "vitest";
+import { simulation as singleFileSimulation } from "../example/singleFileServer";
+import { simulation as extensiveSimulation } from "../example/extensiveServer";
+
+describe("server start and close", () => {
+  bench("single file server", async () => {
+    let app = await singleFileSimulation;
+    let server = await app.listen();
+    await server.ensureClose();
+  });
+
+  bench("extensive server", async () => {
+    let app = await extensiveSimulation;
+    let server = await app.listen();
+    await server.ensureClose();
+  });
+});