ci: add benchmark comment workflow

.github/workflows/benchmark-comment.yml

@@ -0,0 +1,63 @@
+name: Benchmark Comment
+
+on:
+  workflow_run:
+    workflows: [Benchmark]
+    types: [completed]
+
+jobs:
+  comment:
+    name: Post Benchmark Results
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      pull-requests: write
+    if: github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request'
+
+    steps:
+      - name: Download benchmark artifact
+        uses: actions/download-artifact@v7
+        with:
+          name: benchmark-result
+          path: benchmark-artifact/
+          run-id: ${{ github.event.workflow_run.id }}
+          github-token: ${{ github.token }}
+
+      - name: Read artifact data
+        id: bench
+        run: |
+          echo "pr-number=$(cat benchmark-artifact/pr-number.txt)" >> "$GITHUB_OUTPUT"
+          echo "head-ref=$(cat benchmark-artifact/head-ref.txt)" >> "$GITHUB_OUTPUT"
+          echo "base-ref=$(cat benchmark-artifact/base-ref.txt)" >> "$GITHUB_OUTPUT"
+          echo "base-sha=$(cat benchmark-artifact/base-sha.txt)" >> "$GITHUB_OUTPUT"
+          echo "head-sha=$(cat benchmark-artifact/head-sha.txt)" >> "$GITHUB_OUTPUT"
+          {
+            echo "result<<BENCH_EOF"
+            cat benchmark-artifact/benchmark-result.txt
+            echo "BENCH_EOF"
+          } >> "$GITHUB_OUTPUT"
+
+      - name: Find existing comment
+        uses: peter-evans/find-comment@v4
+        id: find-comment
+        with:
+          issue-number: ${{ steps.bench.outputs.pr-number }}
+          comment-author: github-actions[bot]
+          body-includes: "## Benchmark Results"
+
+      - name: Post benchmark results
+        uses: peter-evans/create-or-update-comment@v5
+        with:
+          issue-number: ${{ steps.bench.outputs.pr-number }}
+          comment-id: ${{ steps.find-comment.outputs.comment-id }}
+          edit-mode: replace
+          body: |
+            ## Benchmark Results
+
+            Comparison of `${{ steps.bench.outputs.head-ref }}` against `${{ steps.bench.outputs.base-ref }}` (`${{ steps.bench.outputs.base-sha }}`).
+
+            ```
+            ${{ steps.bench.outputs.result }}
+            ```
+
+            <sub>Generated by phpbench against commit ${{ steps.bench.outputs.head-sha }}</sub>

.github/workflows/benchmark.yml

@@ -1,12 +1,12 @@
 name: Benchmark
 
 on:
-  pull_request_target:
+  pull_request:
     branches: [main]
 
-permissions:
-  pull-requests: write
-  issues: write
+concurrency:
+  group: benchmark-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
 
 jobs:
   benchmark:
@@ -33,44 +33,27 @@ jobs:
         run: |
           git checkout ${{ github.event.pull_request.base.sha }}
           composer install --no-interaction --prefer-dist --quiet
-          vendor/bin/phpbench run --tag=base --store --progress=dots
+          vendor/bin/phpbench run --tag=base --store --progress=none
 
       - name: Benchmark PR branch
         run: |
           git checkout ${{ github.event.pull_request.head.sha }}
           composer install --no-interaction --prefer-dist --quiet
-          vendor/bin/phpbench run --tag=pr --store --ref=base --report=aggregate --progress=dots > benchmark-result.txt 2>&1 || true
+          vendor/bin/phpbench run --tag=pr --store --ref=base --report=aggregate --progress=none 2>&1 | tee benchmark-result.txt || true
 
-      - name: Read benchmark result
-        id: bench
+      - name: Prepare artifact
         run: |
-          {
-            echo "result<<BENCH_EOF"
-            cat benchmark-result.txt
-            echo "BENCH_EOF"
-          } >> "$GITHUB_OUTPUT"
-
-      - name: Find existing comment
-        uses: peter-evans/find-comment@v4
-        id: find-comment
-        with:
-          issue-number: ${{ github.event.pull_request.number }}
-          comment-author: github-actions[bot]
-          body-includes: "## Benchmark Results"
-
-      - name: Post benchmark results
-        uses: peter-evans/create-or-update-comment@v5
+          mkdir -p benchmark-artifact
+          cp benchmark-result.txt benchmark-artifact/
+          echo "${{ github.event.pull_request.number }}" > benchmark-artifact/pr-number.txt
+          echo "${{ github.head_ref }}" > benchmark-artifact/head-ref.txt
+          echo "${{ github.base_ref }}" > benchmark-artifact/base-ref.txt
+          echo "${{ github.event.pull_request.base.sha }}" > benchmark-artifact/base-sha.txt
+          echo "${{ github.event.pull_request.head.sha }}" > benchmark-artifact/head-sha.txt
+
+      - name: Upload benchmark artifact
+        uses: actions/upload-artifact@v6
         with:
-          issue-number: ${{ github.event.pull_request.number }}
-          comment-id: ${{ steps.find-comment.outputs.comment-id }}
-          edit-mode: replace
-          body: |
-            ## Benchmark Results
-
-            Comparison of `${{ github.head_ref }}` against `${{ github.base_ref }}` (`${{ github.event.pull_request.base.sha }}`).
-
-            ```
-            ${{ steps.bench.outputs.result }}
-            ```
-
-            <sub>Generated by phpbench against commit ${{ github.event.pull_request.head.sha }}</sub>
+          name: benchmark-result
+          path: benchmark-artifact/
+          retention-days: 1