Optimize padding on Piece

piece.go

@@ -48,8 +48,8 @@ type Piece struct {
 	// length can be determined by the request chunkSize in use.
 	_dirtyChunks bitmap.Bitmap
 
-	hashing             bool
 	numVerifies         int64
+	hashing             bool
 	storageCompletionOk bool
 
 	publicPieceState PieceState

piece_test.go

@@ -6,5 +6,7 @@ import (
 )
 
 func TestPieceSize(t *testing.T) {
-	t.Logf("%v", unsafe.Sizeof(Piece{}))
+	t.Log("[]*File", unsafe.Sizeof([]*File(nil)))
+	t.Log("Piece", unsafe.Sizeof(Piece{}))
+	t.Log("map[*peer]struct{}", unsafe.Sizeof(map[*peer]struct{}(nil)))
 }