fixed IsPlainObject

TODO

@@ -42,6 +42,10 @@ Polish the changes/last_row_id API of .run()
 
 reduce the number of memory copies
 
+optimize binding by creating bind maps when statements and transactions are
+created. This way, we can eliminate overhead caused by the NextAnonIndex()
+and GetNamedParameterIndex() functions
+
 if we promisify run(), get(), all(), or each(), their performance will suffer
 if more than 3 arguments are passed (more than 2 bound arguments for each())
 

src/binder/is-plain-object.cc

@@ -2,6 +2,9 @@
 
 bool Binder::IsPlainObject(v8::Local<v8::Object> obj) {
 	v8::Local<v8::Value> proto = obj->GetPrototype();
+	v8::Local<v8::Context> ctx = obj->CreationContext();
+	ctx->Enter();
 	v8::Local<v8::Value> baseProto = Nan::New<v8::Object>()->GetPrototype();
+	ctx->Exit();
 	return proto->StrictEquals(baseProto) || proto->StrictEquals(Nan::Null());
 }