Tenderlove Making - Profiling Rails startup with DTrace
TL;DR: I’m adding DTrace probes to Ruby, and I used those to make a 6% performance improvement to rake environment. ruby*:::function-entry { printf("-> %s::%s (%s:%d)\n", copyinstr(arg0), copyinstr(arg1), copyinstr(arg2), arg3); } $ sudo dtrace -q -s calls.d -c'rake environment' -> Module::local_constant_names (/Users/aaron/git/rails/activesupport/lib/active_support/core_ext/module/introspection.r
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Welcome to Joyent’s DTrace site What is DTrace? From sun.com’s BigAdmin : “DTrace is a comprehensive dynamic tracing framework for the Solaris Operating Environment. DTrace provides a powerful infrastructure to permit administrators, developers, and service personnel to concisely answer arbitrary questions about the behavior of the operating system and user programs.†What is the point of this sit
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DTrace and Ruby on Rails with Leopard/Snow Leopard : Andy Jeffries : Ruby on Rails, MySQL and jQuery Developer
http://docs.sun.com/app/docs/doc/819-6259/gcfba?l=ja&a=view
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