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(defn when-its-one []
          (loop []
              (if (= 1 (rand-int 2000))
                1
                [(println "foo")
                 (recur)])))

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wget http://rubyforge.org/frs/download.php/70304/ruby-debug-base-0.10.3.2-java.gem
gem install ruby-debug-base-0.10.3.2-java.gem 
gem install columnize
rm ruby-debug-base-0.10.3.2-java.gem 
gem install ruby-debug --ignore-dependencies

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Debugging ruby performance - Aman Gupta

C, Linux, networks, cpu, and memory usage

• lsof -nPp <pid>
• tcpdump
• write the data to a file, load it up in wireshark
• strace, trace systems calls and signals (jump into kernelspace)
• SIGVTALRM, ruby 1.8 every 10msec to switch threads (green threads)
• posix-spawn instead of fork-exec, check out posix-spawn gem
• ltrace

– ltrace -c ruby foo.rb # summary mode

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rcov 1.8 simple cov 1.9.x

SOLID Principles behind Rails 3.1

Single responsibility principle

• One reason for a class to change
• Makes Top-down comprehensibility (admittedly)
• Better for maintainability,

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ruby 1.8.7-p249
Finished in 121.97 seconds
1148 examples, 0 failures
rake spec  124.69s user 0.99s system 95% cpu 2:11.11 total

ree-1.8.7.2011.03
Finished in 60.47 seconds
1148 examples, 0 failures
rake spec  60.77s user 2.26s system 98% cpu 1:03.70 total

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; Insert today's standup template into my org doc
(defun standup-org()
  (interactive)
  (insert "* Joe W. " (format-time-string "%Y-%m-%d") "\n")
  (insert
   (mapconcat 'identity '("** Yesterday" "** Today" "** Next" "") "\n-\n"))

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~/src/rspec_minitest_benchmark (411d12h19m|master*)
$ time rspec rspec.rb && time ruby minispec.rb && time ruby minitest.rb
................

Finished in 0.00415 seconds
16 examples, 0 failures
rspec rspec.rb  0.22s user 0.05s system 98% cpu 0.278 total
Run options: --seed 24680

# Running tests:

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"\e[A": history-search-backward
"\e[B": history-search-forward
$if Bash
  Space: magic-space
$endif
"\M-o": "\C-p\C-a\M-f "
set completion-ignore-case on
set visible-stats on
set show-all-if-ambiguous on
"\M-s": menu-complete

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# -*- encoding: utf-8 -*-

Gem::Specification.new do |s|
  s.name = "badfruit"
  s.version = "1.1.2"

  s.required_rubygems_version = Gem::Requirement.new(">= 1.2") if s.respond_to? :required_rubygems_version=
  s.authors = ["Brian Michel"]
  s.date = "2012-04-21"
  s.description = "Interface with the Rotten Tomatoes API"

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class String
  include Enumerable

  def each(&block)
    chars.each do |member|
      block.call(member)
    end
  end
end