Stan Lo dde7134e07 Freeze fragment cache related instrument name. ... ActionMailer::Base#instrument_name and ActionController::Base#instrument_name will be frequently called once caching is enabled. So it's better to freeze them instead of create new string on every call. Also, the instrument name in #instrument_fragment_cache will usually be "write_fragment.action_controller" or "read_fragment.action_controller". So freezing them might also gain some performance improvement. We have done something like this in other places: https://github.com/rails/rails/blob/master/actionview/lib/action_view/template.rb#L348		2017-02-07 00:41:02 +08:00
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fragments.rb	Freeze fragment cache related instrument name.	2017-02-07 00:41:02 +08:00