gob: avoid a couple of init-time allocations.

R=r
CC=golang-dev
https://golang.org/cl/4806049

diff --git a/src/pkg/gob/type.go b/src/pkg/gob/type.go
index 258a01e158d26d631f1d288a37676db7f3cf0c04..b2f716c4b5d97aa4e9a132f2d861ee7925081501 100644 (file)
--- a/src/pkg/gob/type.go
+++ b/src/pkg/gob/type.go
@@ -81,8 +81,8 @@ func validUserType(rt reflect.Type) (ut *userTypeInfo, err os.Error) {
 }
 
 var (
-       gobEncoderInterfaceType = reflect.TypeOf(new(GobEncoder)).Elem()
-       gobDecoderInterfaceType = reflect.TypeOf(new(GobDecoder)).Elem()
+       gobEncoderInterfaceType = reflect.TypeOf((*GobEncoder)(nil)).Elem()
+       gobDecoderInterfaceType = reflect.TypeOf((*GobDecoder)(nil)).Elem()
 )
 
 // implementsInterface reports whether the type implements the