Synchronize delivery test fixtures and record the concurrency audit

performance_delivery_test.go

@@ -47,8 +47,9 @@ type deliveryBenchmarkIdentity struct {
 func BenchmarkPerformanceFacadeDeliver(b *testing.B) {
 	repository, build, expected := newDeliveryBenchmarkFixture(b)
 	state := &deliveryBenchmarkServer{commit: gitText(b, repository, "rev-parse", "HEAD"), assets: expected}
-	server := httptest.NewServer(http.HandlerFunc(state.serveHTTP))
-	state.baseURL = server.URL
+	server := httptest.NewUnstartedServer(http.HandlerFunc(state.serveHTTP))
+	state.baseURL = "http://" + server.Listener.Addr().String()
+	server.Start()
 	b.Cleanup(server.Close)
 	request := releasekit.DeliveryRequest{
 		RepositoryDir: repository,