Merge branch 'refs/heads/master' into more-benchmarks

# Conflicts:
#	mdbx/cursor_test.go

mdbx/cursor_test.go

@@ -1567,7 +1567,7 @@ func BenchmarkCursor_Renew(b *testing.B) {
 	})
 }
 
-func BenchmarkCursor_SetRange_OneKey(b *testing.B) {
+func BenchmarkCursor_Set_OneKey(b *testing.B) {
 	env, _ := setup(b)
 
 	var db DBI
@@ -1635,6 +1635,51 @@ func BenchmarkCursor_SetRange_Sequence(b *testing.B) {
 		return
 	}
 
+	if err := env.View(func(txn *Txn) (err error) {
+		c, err := txn.OpenCursor(db)
+		if err != nil {
+			return err
+		}
+		b.ResetTimer()
+		for i := 0; i < b.N; i++ {
+			_, _, err := c.Get(k, nil, Set)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}); err != nil {
+		b.Errorf("put: %v", err)
+	}
+}
+
+func BenchmarkCursor_Set_Sequence(b *testing.B) {
+	env, _ := setup(b)
+
+	var db DBI
+	keys := make([][]byte, b.N, b.N)
+	for i := range keys {
+		keys[i] = make([]byte, 8)
+		binary.BigEndian.PutUint64(keys[i], uint64(i))
+	}
+
+	if err := env.Update(func(txn *Txn) (err error) {
+		db, err = txn.OpenRoot(0)
+		if err != nil {
+			return err
+		}
+		for _, k := range keys {
+			err = txn.Put(db, k, k, 0)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}); err != nil {
+		b.Errorf("dbi: %v", err)
+		return
+	}
+
 	if err := env.View(func(txn *Txn) (err error) {
 		c, err := txn.OpenCursor(db)
 		if err != nil {
@@ -1653,7 +1698,7 @@ func BenchmarkCursor_SetRange_Sequence(b *testing.B) {
 	}
 }
 
-func BenchmarkCursor_SetRange_Random(b *testing.B) {
+func BenchmarkCursor_Set_Random(b *testing.B) {
 	env, _ := setup(b)
 
 	var db DBI