Update go.yml

.github/workflows/go.yml

@@ -12,7 +12,6 @@ jobs:
     name: Build
     runs-on: ubuntu-latest
     steps:
-
     - name: Set up Go 1.x
       uses: actions/setup-go@v2
       with:
@@ -25,11 +24,32 @@ jobs:
     - name: Test
       run: make test
 
-    - name: Bench
-      run: make bench | tee bench-output.txt
-
-    - name: Store benchmark result
-      uses: rhysd/github-action-benchmark@v1
-      with:
-        tool: 'go'
-        output-file-path: bench-output.txt
+  benchmark:
+    name: Performance regression check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go 1.x
+        uses: actions/setup-go@v2
+        with:
+          go-version: ^1.13
+        id: go
+
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+
+      - name: Run benchmark
+        run: go test -bench 'Benchmark' | tee output.txt
+
+      - name: Download previous benchmark data
+        uses: actions/cache@v1
+        with:
+          path: ./cache
+          key: ${{ runner.os }}-benchmark
+
+      - name: Store benchmark result
+        uses: rhysd/github-action-benchmark@v1
+        with:
+          tool: 'go'
+          output-file-path: output.txt
+          external-data-json-path: ./cache/benchmark-data.json
+          fail-on-alert: true