[#135] metabase: Implement benchmarking tests

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/local_object_storage/metabase/select_test.go

@@ -0,0 +1,100 @@
+package meta
+
+import (
+	"crypto/rand"
+	"os"
+	"testing"
+
+	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/stretchr/testify/require"
+	"go.etcd.io/bbolt"
+)
+
+func addNFilters(fs *objectSDK.SearchFilters, n int) {
+	for i := 0; i < n; i++ {
+		key := make([]byte, 32)
+		rand.Read(key)
+
+		val := make([]byte, 32)
+		rand.Read(val)
+
+		fs.AddFilter(string(key), string(val), objectSDK.MatchStringEqual)
+	}
+}
+
+func BenchmarkDB_Select(b *testing.B) {
+	path := "select_test.db"
+
+	bdb, err := bbolt.Open(path, 0600, nil)
+	require.NoError(b, err)
+
+	defer func() {
+		bdb.Close()
+		os.Remove(path)
+	}()
+
+	db := NewDB(bdb)
+
+	for i := 0; i < 100; i++ {
+		obj := generateObject(b, testPrm{
+			withParent: true,
+			attrNum:    100,
+		})
+
+		require.NoError(b, db.Put(obj))
+	}
+
+	for _, item := range []struct {
+		name    string
+		filters func(*objectSDK.SearchFilters)
+	}{
+		{
+			name: "empty",
+			filters: func(*objectSDK.SearchFilters) {
+				return
+			},
+		},
+		{
+			name: "1 filter",
+			filters: func(fs *objectSDK.SearchFilters) {
+				addNFilters(fs, 1)
+			},
+		},
+		{
+			name: "10 filters",
+			filters: func(fs *objectSDK.SearchFilters) {
+				addNFilters(fs, 10)
+			},
+		},
+		{
+			name: "100 filters",
+			filters: func(fs *objectSDK.SearchFilters) {
+				addNFilters(fs, 100)
+			},
+		},
+		{
+			name: "1000 filters",
+			filters: func(fs *objectSDK.SearchFilters) {
+				addNFilters(fs, 1000)
+			},
+		},
+	} {
+		b.Run(item.name, func(b *testing.B) {
+			b.ReportAllocs()
+			b.ResetTimer()
+
+			for i := 0; i < b.N; i++ {
+				b.StopTimer()
+				fs := new(objectSDK.SearchFilters)
+				item.filters(fs)
+				b.StartTimer()
+
+				_, err := db.Select(*fs)
+
+				b.StopTimer()
+				require.NoError(b, err)
+				b.StartTimer()
+			}
+		})
+	}
+}