Try something.

Author: sbruens

.github/workflows/bench.yml

@@ -12,38 +12,27 @@ jobs:
   bench:
     name: Performance regression check
     runs-on: ubuntu-latest
-    timeout-minutes: 5
     steps:
-      - name: Checkout (previous)
-        uses: actions/checkout@v3
-        with:
-          ref: ${{ github.base_ref }}
-          path: previous
-
       - name: Checkout (new)
         uses: actions/checkout@v3
-        with:
-          path: new
 
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
           go-version-file: '${{ github.workspace }}/new/go.mod'
 
-      - name: Install dependencies
-        run: go install golang.org/x/perf/cmd/benchstat@latest
+      - name: Get dependencies
+        run: go mod download
 
-      - name: Run Benchmark (previous)
-        timeout-minutes: 5
+      - name: Benchmark against GITHUB_BASE_REF
         run: |
-          cd previous
-          go test -bench=. -benchmem -benchtime=100ms -count=10 ./... > benchmark.txt
-
-      - name: Run Benchmark (new)
-        timeout-minutes: 5
-        run: |
-          cd new
-          go test -bench=. -benchmem -benchtime=100ms -count=10 ./... > benchmark.txt
-
-      - name: Run Benchstat
-        run: benchstat previous/benchmark.txt new/benchmark.txt
+         go install golang.org/x/perf/cmd/benchstat@latest
+         echo "New Commit:"
+         git log -1 --format="%H"
+         go test -bench=. -benchmem -benchtime=100ms -count=10 > /tmp/new.txt
+         git reset --hard HEAD
+         git checkout $GITHUB_BASE_REF
+         echo "Base Commit:"
+         git log -1 --format="%H"
+         go test -bench=. -benchmem -benchtime=100ms -count=10 > /tmp/old.txt
+         $GOBIN/benchstat /tmp/old.txt /tmp/new.txt