[#216] blobstor: Classify objects by size according to binary format

In previous implementation objects were classified by size according to
payload size. From now they are classified by the size of their binary
representation.

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

pkg/local_object_storage/blobstor/put.go

@@ -6,7 +6,6 @@ import (
 	"path"
 
 	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
-	"github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/pkg/errors"
 )
 
@@ -35,10 +34,10 @@ func (b *BlobStor) Put(prm *PutPrm) (*PutRes, error) {
 		return nil, errors.Wrap(err, "could not marshal the object")
 	}
 
-	// compress object data
-	data = b.compressor(data)
+	if b.isBig(data) {
+		// compress object data
+		data = b.compressor(data)
 
-	if b.isBig(prm.obj) {
 		// save object in shallow dir
 		return nil, b.fsTree.put(prm.obj.Address(), data)
 	} else {
@@ -46,7 +45,7 @@ func (b *BlobStor) Put(prm *PutPrm) (*PutRes, error) {
 
 		// FIXME: use Blobovnicza when it becomes implemented.
 		//  Temporary save in shallow dir.
-		return nil, b.fsTree.put(prm.obj.Address(), data)
+		return nil, b.fsTree.put(prm.obj.Address(), b.compressor(data))
 	}
 }
 
@@ -61,12 +60,6 @@ func (t *fsTree) put(addr *objectSDK.Address, data []byte) error {
 }
 
 // checks if object is "big".
-func (b *BlobStor) isBig(obj *object.Object) bool {
-	// FIXME: headers are temporary ignored
-	//  due to slight impact in size.
-	//  In fact, we have to honestly calculate the size
-	//  in binary format, which requires Size() method.
-	sz := obj.PayloadSize()
-
-	return sz > b.smallSizeLimit
+func (b *BlobStor) isBig(data []byte) bool {
+	return uint64(len(data)) > b.smallSizeLimit
 }