trie: avoid unnecessary slicing on shortnode decoding (ethereum#16917)

optimization code
kielbarry · Jul 9, 2018 · cc1b118 · cc1b118
1 parent 4add50f
commit cc1b118
Showing 1 changed file with 3 additions and 4 deletions.
diff --git a/trie/encoding.go b/trie/encoding.go
@@ -53,10 +53,9 @@ func hexToCompact(hex []byte) []byte {
 
 func compactToHex(compact []byte) []byte {
 	base := keybytesToHex(compact)
-	base = base[:len(base)-1]
-	// apply terminator flag
-	if base[0] >= 2 {
-		base = append(base, 16)
+	// delete terminator flag
+	if base[0] < 2 {
+		base = base[:len(base)-1]
 	}
 	// apply odd flag
 	chop := 2 - base[0]&1