reflect: add fast path for FieldByIndex with len(index) = 1

LGTM=r R=r CC=golang-codereviews https://golang.org/cl/152640043
SARDONYX-forks · Oct 15, 2014 · 94950af · 94950af
1 parent cb6f5ac
commit 94950af
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/reflect/value.go b/src/reflect/value.go
@@ -857,6 +857,9 @@ func (v Value) Field(i int) Value {
 // FieldByIndex returns the nested field corresponding to index.
 // It panics if v's Kind is not struct.
 func (v Value) FieldByIndex(index []int) Value {
+	if len(index) == 1 {
+		return v.Field(index[0])
+	}
 	v.mustBe(Struct)
 	for i, x := range index {
 		if i > 0 {