npm install && node --expose-gc addon.js

The heap keeps growing with each iteration because of leaking v8::FunctionTemplate objects - is there a better pattern for a function factory where the returned functions still have a reference to the unique object from which they were created?

Creating a static Nan::Persistent<v8::FunctionTemplate> seems to eliminate the possibility of attaching a void* accessible via info.Data(). I've tried using v8::Function::SetHiddenValue, and Nan::SetInternalFieldPointer as well but can't seem to get a workable non-leaking solution.