Re: [Gems-users] cache statistics with timing info.

[Mike Marty <mikem@xxxxxxxxxxx>]

>
> In short, set the RUBY_DEBUG Makefile flag to true.  Ensure that the
> PROTOCOL_DEBUG_TRACE option is also set to true in the
> ruby/config/rubydefaults.config.
>

To clarify, uncomment this line in the ruby/Makefile to get the protocol
debug trace functionality.

#DEBUG_FLAGS += -DRUBY_DEBUG=true

Also the Ruby config file is actually ruby/config/rubyconfig.defaults.
This file specifies the compile-time options.  Most of these can also be
changed at run-time.