Currently, requiring gon immediately requires ActionView::Base and ActionController::Basehere for monkey-patching, which results in loading almost everything within actionview and actionpack, and also triggers all :action_view and :action_controller on_load hooks that are defined via apps and bundled plugins.
For postponing those heavy loads, Rails equips ActiveSupport.on_load mechanism as described here. https://guides.rubyonrails.org/engines.html#active-support-on-load-hooks
With this hooks properly configured, applications can defer loading Action*::Base until they actually use them, so that they can boot the app faster where they don't use them, e.g. when starting up the Rails console, running model unit tests, etc.
gazay
commented
5 years ago
Currently, requiring
gonimmediately requiresActionView::BaseandActionController::Basehere for monkey-patching, which results in loading almost everything within actionview and actionpack, and also triggers all:action_viewand:action_controlleron_load hooks that are defined via apps and bundled plugins.For postponing those heavy loads, Rails equips
ActiveSupport.on_loadmechanism as described here. https://guides.rubyonrails.org/engines.html#active-support-on-load-hooks With this hooks properly configured, applications can defer loading Action*::Base until they actually use them, so that they can boot the app faster where they don't use them, e.g. when starting up the Rails console, running model unit tests, etc.