init cache

Author: MarshalX

.github/workflows/benchmark.yml

@@ -1,5 +1,11 @@
 name: Benchmark
-on: [ pull_request, push, workflow_dispatch ]
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
 
 permissions:
   contents: write
@@ -14,36 +20,43 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout repository.
+      - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Install UV.
+      - name: Install UV
         uses: astral-sh/setup-uv@v6
 
-      - name: Install dependencies.
+      - name: Install dependencies
         run: uv sync --group testing
 
-      - name: Compile.
+      - name: Compile
         run: uv pip install -v -e .
         env:
           RUST_BACKTRACE: 1
 
-      - name: Run Benchmarks.
+      - name: Run Benchmarks
         run: uv run pytest . -m benchmark_main --benchmark-enable --benchmark-json=output.json
 
-      - name: Upload benchmark artifact
-        uses: actions/upload-artifact@v4
+      - name: Seed benchmark cache for main (one-time)
+        run: |
+          mkdir -p benchmark-data
+          cp output.json benchmark-data/output.json
+        env:
+          SEEDED_BENCHMARK_KEY: benchmark-${{ runner.os }}-refs/heads/main
+
+      - name: Download previous benchmark data
+        uses: actions/cache@v4
         with:
-          name: benchmark-output
-          path: output.json
+          path: ./benchmark-data
+          key: benchmark-${{ runner.os }}-${{ github.ref }}
 
       - name: Benchmark results
         uses: benchmark-action/github-action-benchmark@v1
         with:
           tool: 'pytest'
           output-file-path: output.json
-          external-data-json-path: POOP.json
-          # to make a commit comment
+          external-data-json-path: ./benchmark-data/output.json
           github-token: ${{ secrets.GITHUB_TOKEN }}
           summary-always: true
           skip-fetch-gh-pages: true
+          save-data-file: ${{ github.event_name != 'pull_request' }}