chore(ci): separate the benchmark workflow

.github/workflows/ci.yml

@@ -55,19 +55,3 @@ jobs:
         run: pip install pytest-benchmark~=4.0.0
       - name: Run tests
         run: pytest -vs
-
-  benchmarks:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Set up Python 3.12
-        uses: actions/setup-python@v2
-        with:
-          python-version: "3.12.0-beta.1"
-      - name: Install local version of pytest-codspeed
-        run: pip install .
-
-      - name: Run benchmarks
-        uses: CodSpeedHQ/action@main
-        with:
-          run: pytest tests/benchmarks/ --codspeed

.github/workflows/codspeed.yml

@@ -0,0 +1,23 @@
+name: benchmarks
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+  workflow_dispatch:
+
+jobs:
+  benchmarks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.12.0-beta.3"
+      - name: Install local version of pytest-codspeed
+        run: pip install .
+      - name: Run benchmarks
+        uses: CodSpeedHQ/action@main
+        with:
+          run: pytest tests/benchmarks/ --codspeed