diff --git a/.clang-tidy b/.clang-tidy
index 4e4af908e26..4b9fa61bcc8 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -1,4 +1,4 @@
-WarningsAsErrors: "*"
+WarningsAsErrors: "" # "*" for Werror behaviour.
 UseColor: true
 HeaderFilterRegex: '^(?!MPI_api.h$|PETSc_api.h$).*' # Pulled in from python packages and not classified as system headers
 ExtraArgsBefore:
@@ -6,3 +6,7 @@ ExtraArgsBefore:
 Checks: >
   -*,
   performance*
+CheckOptions:
+  # Design decision: pass nb::ndarray by value, not const ref.
+  - key: performance-unnecessary-value-param.AllowedTypes
+    value: 'nanobind::ndarray'
diff --git a/.github/workflows/clang-tidy.yml b/.github/workflows/clang-tidy.yml
index 175b7e1fd26..d48d0a8a5a8 100644
--- a/.github/workflows/clang-tidy.yml
+++ b/.github/workflows/clang-tidy.yml
@@ -1,9 +1,9 @@
 name: clang-tidy
 
 on:
-  # schedule:
-  #   # daily at 1am
-  #   - cron: "0 1 * * *"
+  schedule:
+    # daily at 1am
+    - cron: "0 1 * * *"
   # pull_request:
   #   branches:
   #     - main
diff --git a/cpp/dolfinx/graph/utils.cpp b/cpp/dolfinx/graph/utils.cpp
index f015467a686..4a0781461d5 100644
--- a/cpp/dolfinx/graph/utils.cpp
+++ b/cpp/dolfinx/graph/utils.cpp
@@ -94,6 +94,7 @@ graph::comm_graph(const common::IndexMap& map, int root)
   dolfinx::MPI::check_error(comm, ierr);
 
   std::vector<std::tuple<int, std::size_t, std::int8_t>> e_data;
+  e_data.reserve(edges_remote.size());
   for (std::size_t i = 0; i < edges_remote.size(); ++i)
     e_data.emplace_back(edges_remote[i], weights_remote[i], markers_remote[i]);
   return graph::AdjacencyList(std::move(e_data),