ci: faster ui preview (#33890)

* fast

* fast

* cleanup

.github/workflows/selfdrive_tests.yaml

@@ -352,19 +352,29 @@ jobs:
   create_ui_report:
     # This job name needs to be the same as UI_JOB_NAME in ui_preview.yaml
     name: Create UI Report
-    runs-on: ubuntu-latest
+    runs-on: ${{ ((github.repository == 'commaai/openpilot') &&
+                   ((github.event_name != 'pull_request') ||
+                    (github.event.pull_request.head.repo.full_name == 'commaai/openpilot'))) && 'namespace-profile-amd64-8x16' || 'ubuntu-24.04' }}
     steps:
       - uses: actions/checkout@v4
         with:
           submodules: true
       - uses: ./.github/workflows/setup-with-retry
+      - name: caching frames
+        id: frames-cache
+        uses: actions/cache@v4
+        with:
+          path: .ci_cache/comma_download_cache
+          key: ui_screenshots_test_${{ hashFiles('selfdrive/ui/tests/test_ui/run.py') }}
       - name: Build openpilot
         run: ${{ env.RUN }} "scons -j$(nproc)"
       - name: Create Test Report
+        timeout-minutes: ${{ ((steps.frames-cache.outputs.cache-hit == 'true') && 1 || 3) }}
         run: >
             ${{ env.RUN }} "PYTHONWARNINGS=ignore &&
                             source selfdrive/test/setup_xvfb.sh &&
-                            python3 selfdrive/ui/tests/test_ui/run.py"
+                            CACHE_ROOT=/tmp/comma_download_cache python3 selfdrive/ui/tests/test_ui/run.py &&
+                            chmod -R 777 /tmp/comma_download_cache"
       - name: Upload Test Report
         uses: actions/upload-artifact@v4
         with: