--- a/src/hotspot/share/oops/instanceKlass.hpp	Thu Nov 14 10:02:52 2019 +0800
+++ b/src/hotspot/share/oops/instanceKlass.hpp	Wed Nov 13 16:36:54 2019 -0800
@@ -329,6 +329,8 @@
 
   friend class SystemDictionary;
 
+  static bool _disable_method_binary_search;
+
  public:
   u2 loader_type() {
     return _misc_flags & loader_type_bits();
@@ -564,6 +566,14 @@
   bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
   bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
 
+ private:
+  static int quick_search(const Array<Method*>* methods, const Symbol* name);
+
+ public:
+  static void disable_method_binary_search() {
+    _disable_method_binary_search = true;
+  }
+
   // find a local method (returns NULL if not found)
   Method* find_method(const Symbol* name, const Symbol* signature) const;
   static Method* find_method(const Array<Method*>* methods,