Add slow jest reporter (#9599)

Add slow jest reporter

.github/workflows/tests.yml

@@ -29,7 +29,12 @@ jobs:
         id: cpu-cores
         uses: SimenB/github-actions-cpu-cores@v1
 
+      - name: Run tests with coverage and metrics
+        if: github.ref == 'refs/heads/develop'
+        run: "yarn coverage --ci --reporters github-actions '--reporters=<rootDir>/test/slowReporter.js' --max-workers ${{ steps.cpu-cores.outputs.count }}"
+
       - name: Run tests with coverage
+        if: github.ref != 'refs/heads/develop'
         run: "yarn coverage --ci --reporters github-actions --max-workers ${{ steps.cpu-cores.outputs.count }}"
 
       - name: Upload Artifact

test/slowReporter.js

@@ -0,0 +1,17 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+module.exports = require('matrix-js-sdk/spec/slowReporter');