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POErrors with ruby-prof in a Rails Performance Test
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  1. POErrors with ruby-prof in a Rails Performance Test
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    copied!<p>I'm creating a Rails Performance test, as described in the <a href="http://guides.rubyonrails.org/performance_testing.html#installing-gc-patched-mri" rel="noreferrer">Rails Guide</a>, and I'm having problems with ruby-prof.</p> <p>I'm using Ruby 1.9.2-p0 (though experienced the same issue on p320) and Rails 3.1.0.</p> <p>I have a pretty simple test for a controller that is equivalent to <a href="http://guides.rubyonrails.org/performance_testing.html#controller-example" rel="noreferrer">this example</a>.</p> <p>According to <a href="http://guides.rubyonrails.org/performance_testing.html#using-ruby-prof-on-mri-and-ree" rel="noreferrer">the guide</a>, I need to install ruby-prof before I can use performance tests. Sure enough, if I run my performance test without it, I get:</p> <blockquote> <p>Specify ruby-prof as application's dependency in Gemfile to run benchmarks.</p> </blockquote> <p>If I follow the guide's instructions to the letter, I add this to my Gemfile:</p> <blockquote> <p>gem 'ruby-prof', :git => 'git://github.com/wycats/ruby-prof.git'</p> </blockquote> <p>...and get version 0.11.0 from the wycats repository. When I run my test I get this error:</p> <pre><code>/Users/craig/.rvm/gems/ruby-1.9.2-p0/bundler/gems/ruby-prof-ffae61a89553/lib/ruby-prof/abstract_printer.rb:44:in `inspect': undefined method `to_s' for #&lt;Class:0x000001025a3f18&gt; (NoMethodError) from /Users/craig/.rvm/gems/ruby-1.9.2-p0/bundler/gems/ruby-prof-ffae61a89553/lib/ruby-prof/abstract_printer.rb:44:in `full_name' ... </code></pre> <p>But "wycats" doesn't appear to be the canonical Github repo for ruby-prof. The documentation refers to <a href="https://github.com/rdp/ruby-prof" rel="noreferrer">rdp</a> (Roger Pack). If I use that repo instead:</p> <blockquote> <p>gem 'ruby-prof', :git => 'git://github.com/rdp/ruby-prof.git'</p> </blockquote> <p>...I get version 0.11.2, and get this error:</p> <blockquote> <p>/Users/craig/.rvm/gems/ruby-1.9.2-p0/gems/activesupport-3.1.0/lib/active_support/testing/performance/ruby.rb:39:in <code>run': undefined method</code>values' for [#]:Array (NoMethodError) from /Users/craig/.rvm/gems/ruby-1.9.2-p0/gems/activesupport-3.1.0/lib/active_support/testing/performance.rb:140:in `run_profile' ...</p> </blockquote> <p>I get the same error if I just use the gem from rubygems directly (again, version 0.11.2): </p> <blockquote> <p>gem 'ruby-prof'</p> </blockquote> <p>Any ideas what's going wrong, or how to resolve it?</p> <blockquote> <p></p> </blockquote>
 

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