Add benchmark workflow

.github/workflows/protocol-benchmark.yml

@@ -0,0 +1,46 @@
+name: Protocol Benchmark
+on:  # yamllint disable-line rule:truthy
+  pull_request:
+    paths:
+      - 'protocol/lib/**'
+  push:
+    branches:
+      - main
+      - 'release/protocol/v[0-9]+.[0-9]+.x'  # e.g. release/protocol/v0.1.x
+      - 'release/protocol/v[0-9]+.x'  # e.g. release/protocol/v1.x
+    paths:
+      - 'protocol/lib/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  benchmark:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./protocol
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v3
+      - name: Setup Golang
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.22
+      - name: Run Benchmarks
+        run: make benchmark | tee ./benchmark_output.txt
+      - name: Download previous benchmark data
+        uses: actions/cache@v4
+        with:
+          path: ./cache
+          key: ${{ runner.os }}-benchmark
+      - name: Store benchmark result
+        uses: benchmark-action/github-action-benchmark@v1
+        with:
+          tool: 'go'
+          output-file-path: ./protocol/benchmark_output.txt
+          external-data-json-path: ./cache/benchmark-data.json
+          fail-on-alert: true
+          alert-threshold: '150%'
+          save-data-file: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}

protocol/Makefile

@@ -231,7 +231,7 @@ test-unit-and-integration:
 	@VERSION=$(VERSION) go test -mod=readonly -tags='integration_test test_ledger_mock $(build_tags)' ./...
 
 benchmark:
-	@VERSION=$(VERSION) go test -mod=readonly -tags='$(build_tags)' -bench=. ./...
+	@VERSION=$(VERSION) go test -mod=readonly -tags='$(build_tags)' -run=^# -bench=. -benchtime=5s -benchmem ./...
 
 test-container:
 	@SKIP_DISABLED=true VERSION=$(VERSION) go test -mod=readonly -tags='container_test $(build_tags)' ./...
@@ -421,6 +421,6 @@ update-sample-pregenesis:
 check-sample-pregenesis-up-to-date:
 	$(MAKE) localnet-build
 	@docker build . -t check-sample-pregenesis -f scripts/genesis/Dockerfile --no-cache
-	@docker run -v $(CURDIR):/workspace check-sample-pregenesis 
+	@docker run -v $(CURDIR):/workspace check-sample-pregenesis
 
 .PHONY: update-sample-pregenesis check-sample-pregenesis-up-to-date

protocol/lib/big_math_test.go

@@ -387,6 +387,16 @@ func TestBigRatMulPpm(t *testing.T) {
 	}
 }
 
+func BenchmarkBigRatMulPpm(b *testing.B) {
+	input := big.NewRat(1_000_000, 1_234_567)
+	ppm := uint32(5)
+	var result *big.Rat
+	for i := 0; i < b.N; i++ {
+		result = lib.BigRatMulPpm(input, ppm)
+	}
+	require.Equal(b, big.NewRat(5, 1_234_567), result)
+}
+
 func TestBigRatClamp(t *testing.T) {
 	tests := map[string]struct {
 		input          *big.Rat