rails/rails — pull request #12556 by dasch (2013-10-16 08:41:16+00:00)
Title: Instrument the generation of Action Mailer messages

Currently, only the time spent _sending_ a mail is instrumented in Action Mailer. The time it takes to render the views and building the mail object itself is not instrumented at all.

This PR adds very basic instrumentation. More data, such as view rendering time, database time, and really anything, can be added later.