[#447] pilorama: Add benchmark for create ops

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/local_object_storage/pilorama/bench_test.go

@@ -0,0 +1,55 @@
+package pilorama
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sync/atomic"
+	"testing"
+
+	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
+	"github.com/stretchr/testify/require"
+)
+
+func getTimestamp(reorder int, ts Timestamp) Timestamp {
+	base := ts / Timestamp(reorder)
+	rem := ts % Timestamp(reorder)
+	return base*Timestamp(reorder) + Timestamp(reorder) - rem
+}
+
+func BenchmarkCreate(b *testing.B) {
+	// Use `os.TempDir` because we construct multiple times in the same test.
+	tmpDir, err := os.MkdirTemp(os.TempDir(), "*")
+	require.NoError(b, err)
+
+	f := NewBoltForest(
+		WithPath(filepath.Join(tmpDir, "test.db")),
+		WithMaxBatchSize(runtime.GOMAXPROCS(0)))
+	require.NoError(b, f.Open(false))
+	require.NoError(b, f.Init())
+	b.Cleanup(func() {
+		require.NoError(b, f.Close())
+		require.NoError(b, os.RemoveAll(tmpDir))
+	})
+
+	cid := cidtest.ID()
+	treeID := "tree"
+	ctx := context.Background()
+	var index atomic.Int32
+	index.Store(-1)
+	b.SetParallelism(2)
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			i := index.Add(1)
+			op := &Move{
+				Meta:   Meta{Time: getTimestamp(runtime.GOMAXPROCS(0)*2, Timestamp(i+1))},
+				Child:  Node(i + 1),
+				Parent: RootID,
+			}
+			if err := f.TreeApply(ctx, cid, treeID, op, true); err != nil {
+				b.FailNow()
+			}
+		}
+	})
+}