Set up CodSpeed in CI

Author: akx

.github/workflows/test.yml

@@ -163,6 +163,13 @@ jobs:
         flags: ${{ matrix.os == 'ubuntu-latest' && 'GHA_Ubuntu' || 'GHA_macOS' }}
         name: ${{ matrix.os }} Python ${{ matrix.python-version }}
 
+    - name: Run CodSpeed benchmarks
+      uses: CodSpeedHQ/action@a4a36bb07c0638b0b4ca52bf1f3dad1b4289e52f # v4.18.1
+      if: ${{ matrix.os == 'ubuntu-latest' }}
+      with:
+        mode: simulation
+        run: python3 -m pip install pytest-codspeed && pytest -vv --codspeed Tests/benchmarks.py
+
   success:
     permissions:
       contents: none