Add Codspeed profiling Actions workflow.

.github/workflows/codspeed.yml

@@ -0,0 +1,32 @@
+name: codspeed
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  # `workflow_dispatch` allows CodSpeed to trigger backtest
+  # performance analysis in order to generate initial data.
+  workflow_dispatch:
+
+jobs:
+  codspeed-profiling:
+    name: codspeed profiling
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: pdm-project/setup-pdm@v3
+        with:
+          python-version: '3.10'
+          cache: true
+
+      - name: install deps
+        run: |
+          pdm venv create --with-pip --force $PYTHON
+          pdm install -G testing -G testing-extra -G email
+
+      - name: Run CodSpeed benchmarks
+        uses: CodSpeedHQ/action@v1
+        with:
+          run: pdm run pytest ./tests/benchmarks --codspeed

pyproject.toml

@@ -102,6 +102,7 @@ testing = [
     "pytest-examples",
     "faker>=18.13.0",
     "pytest-benchmark>=4.0.0",
+    "pytest-codspeed~=2.2.0",
 ]
 testing-extra = [
     # used when generate devtools docs example