Inline fast-path of Scope::LookupLocal

src/ast/scopes.h

Index: src/ast/scopes.h
diff --git a/src/ast/scopes.h b/src/ast/scopes.h
index 9135c65422b29da459c0b64a55d0cb8e9dc45171..b3c61ada24681fe1119be47272c62b5111244e7e 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -120,7 +120,13 @@ class Scope: public ZoneObject {
   // Declarations
 
   // Lookup a variable in this scope. Returns the variable or NULL if not found.
-  Variable* LookupLocal(const AstRawString* name);
+  Variable* LookupLocal(const AstRawString* name) {
+    Variable* result = variables_.Lookup(name);
+    if (result != nullptr || scope_info_.is_null()) return result;
+    return LookupInScopeInfo(name);
+  }
+
+  Variable* LookupInScopeInfo(const AstRawString* name);
 
   // Lookup a variable in this scope or outer scopes.
   // Returns the variable or NULL if not found.