Optimize services for large datasets

**Feature request**
It would be great to have sorting for handlers.

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

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

Start by locating the handler implementation and configuration entry points, then trace how handlers are currently registered or ordered. Add the `enable_sorting` option with a default of `false`; done means handlers are sorted only when the option is enabled and existing behavior remains unchanged by default.

Written by the indexing model from the issue text.