added GH action

.github/workflows/build-test.yml

@@ -815,6 +815,69 @@ jobs:
           path: .nyc_output
           retention-days: 1
 
+perf-tests:
+    timeout-minutes: 30
+    name: Performance tests
+    # The value of runs-on is the OS of the current job (specified in the strategy matrix below) instead of being hardcoded.
+    runs-on: ${{ matrix.os }}
+    if: github.repository == 'microsoft/vscode-jupyter'
+    needs: [build-vsix, pick_environment]
+    env:
+      VSIX_NAME: ${{ needs.pick_environment.outputs.vsix_name }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        python: [3.9]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Use Python ${{matrix.python}}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{matrix.python}}
+
+      - name: Set CI Path
+        uses: ./.github/actions/set-python
+        id: set-python
+        with:
+          PYTHON_VERSION: ${{matrix.python}}
+
+      - name: Upgrade pip
+        run: python -m pip install -U pip
+
+      - name: Use Node ${{env.NODE_VERSION}}
+        uses: actions/[email protected]
+        with:
+          node-version: ${{env.NODE_VERSION}}
+
+      - name: Download VSIX
+        uses: actions/download-artifact@v2
+        with:
+          name: ${{needs.pick_environment.outputs.vsix_name}}
+
+      - name: Install dependencies (npm ci)
+        run: npm ci --prefer-offline
+
+      - name: pip install system test requirements
+        run: |
+          python -m pip install --upgrade -r build/venv-test-requirements.txt
+          python -m pip --disable-pip-version-check install -t ./pythonFiles/lib/python --no-cache-dir --implementation py --no-deps --upgrade -r requirements.txt
+        shell: bash
+
+      # Compile the test files.
+      - name: Prepare for perf tests
+        run: npx tsc -p ./
+        shell: bash
+
+      - name: Run desktop perf tests
+        env:
+          DISPLAY: 10
+        uses: GabrielBB/[email protected]
+        with:
+          run: npm run testPerformance
+
   coverage:
     name: Coverage reports upload
     runs-on: ubuntu-latest