add lazy_load_hooks.rb, which allows us to declare code that
should be run at some later time. For instance, this allows
us to defer requiring ActiveRecord::Base at boot time purely
to apply configuration. Instead, we register a hook that should
apply configuration once ActiveRecord::Base is loaded.
With these changes, brings down total boot time of a
new app to 300ms in production and 400ms in dev.
TODO: rename base_hook
* Additionally, instead of doing concat("</form>".html_safe), you can do
safe_concat("</form>"), which will skip both the flag set, and the flag
check.
* For the first pass, I converted virtually all #html_safe!s to #html_safe,
and the tests pass. A further optimization would be to try to use
#safe_concat as much as possible, reducing the performance impact if
we know up front that a String is safe.
This consists of:
* String#html_safe! a method to mark a string as 'safe'
* ActionView::SafeBuffer a string subclass which escapes anything unsafe which is concatenated to it
* Calls to String#html_safe! throughout the rails helpers
* a 'raw' helper which lets you concatenate trusted HTML from non-safety-aware sources (e.g. presantized strings in the DB)
* New ERB implementation based on erubis which uses a SafeBuffer instead of a String
Hat tip to Django for the inspiration.
