CI: split benchmarks from other checks

That job was the longest-running, so this should parallelize them.

Author: afeld

.github/workflows/ci.yml

@@ -21,36 +21,14 @@ jobs:
         shell: bash -l {0}
 
     steps:
-    - name: Checkout
-      uses: actions/checkout@v1
+
+    - name: Set up pandas
+      uses: .github/actions/setup
 
     - name: Looking for unwanted patterns
       run: ci/code_checks.sh patterns
       if: always()
 
-    - name: Cache conda
-      uses: actions/cache@v2
-      with:
-        path: ~/conda_pkgs_dir
-        key: ${{ runner.os }}-conda-${{ hashFiles('${{ env.ENV_FILE }}') }}
-
-    - uses: conda-incubator/setup-miniconda@v2
-      with:
-        activate-environment: pandas-dev
-        channel-priority: strict
-        environment-file: ${{ env.ENV_FILE }}
-        use-only-tar-bz2: true
-
-    - name: Environment Detail
-      run: |
-        conda info
-        conda list
-
-    - name: Build Pandas
-      run: |
-        python setup.py build_ext -j 2
-        python -m pip install -e . --no-build-isolation --no-use-pep517
-
     - name: Linting
       run: ci/code_checks.sh lint
       if: always()
@@ -75,6 +53,41 @@ jobs:
       run: pytest --capture=no --strict-markers scripts
       if: always()
 
+  benchmarks:
+    name: Benchmarks
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    steps:
+
+    - name: Checkout
+      uses: actions/checkout@v1
+
+    - name: Cache conda
+      uses: actions/cache@v2
+      with:
+        path: ~/conda_pkgs_dir
+        key: ${{ runner.os }}-conda-${{ hashFiles('${{ env.ENV_FILE }}') }}
+
+    - uses: conda-incubator/setup-miniconda@v2
+      with:
+        activate-environment: pandas-dev
+        channel-priority: strict
+        environment-file: ${{ env.ENV_FILE }}
+        use-only-tar-bz2: true
+
+    - name: Environment Detail
+      run: |
+        conda info
+        conda list
+
+    - name: Build Pandas
+      run: |
+        python setup.py build_ext -j 2
+        python -m pip install -e . --no-build-isolation --no-use-pep517
+
     - name: Running benchmarks
       run: |
         cd asv_bench