Continuous benchmark

.github/workflows/benchmark.yml

@@ -0,0 +1,59 @@
+name: Benchmark
+
+on:
+  pull_request:
+  push:
+    branches: ["main"]
+
+jobs:
+  benchmark:
+    name: Performance regression check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v4
+        with:
+          go-version: "stable"
+
+      # Run benchmark with `go test -bench` and stores the output to a file
+      - name: Run benchmark
+        run: go test -bench 'BenchmarkFib' | tee output.txt
+
+      # Download previous benchmark result from cache (if exists)
+      - name: Download previous benchmark data
+        uses: actions/cache@v4
+        with:
+          path: ./cache
+          key: ${{ runner.os }}-benchmark
+
+      # Run `github-action-benchmark` action
+      - name: Store benchmark result
+        uses: benchmark-action/github-action-benchmark@v1
+        with:
+          name: Go Benchmark
+          # What benchmark tool the output.txt came from
+          tool: 'go'
+          # Where the output from the benchmark tool is stored
+          output-file-path: output.txt
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          auto-push: true
+          # Show alert with commit comment on detecting possible performance regression
+          alert-threshold: '200%'
+          comment-on-alert: true
+          # Workflow will fail when an alert happens
+          fail-on-alert: true
+
+      # Upload the updated cache file for the next job by actions/cache
+      - name: Store benchmark result - separate results repo
+        uses: benchmark-action/github-action-benchmark@v1
+        with:
+          name: Go Benchmark
+          tool: 'go'
+          output-file-path: output.txt
+          github-token: ${{ secrets.BENCHMARK_ACTION_BOT_TOKEN }}
+          auto-push: true
+          # Show alert with commit comment on detecting possible performance regression
+          alert-threshold: '200%'
+          comment-on-alert: true
+          fail-on-alert: true
+          gh-repository: 'github.com/go-fuego/fuego'