Improve routes performance

**Feature request**
It would be great to have filtering for helpers.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_filtering` with default `false`.

Start by locating the route and helper handling, then find where configuration options are defined and loaded. Confirm how helper filtering should behave, ensure enable_filtering defaults to false, and verify the production-deployment use case before considering the work complete.

Written by the indexing model from the issue text.