Class: DiffBench::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/diffbench.rb

Constant Summary collapse

COLORS = 
{:red => 31, :green => 32, :yellow => 33}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/diffbench.rb', line 14

def initialize(*args)
  parser = OptionParser.new do |opts|
    opts.banner = <<-DOC
Usage: diffbench [options] file

When working tree is dirty default is run benchmark againts dirty tree and clean tree.
When working tree is clean default is run benchmark against current head and previous commit.
DOC
    
    opts.on("-r", '--revision [REVISIONS]', 'Specify revisions to run benchmark (comma separated). Example: master,f9a845,v3.1.4') do |value|
      if tree_dirty?
        raise Error, "Working tree is dirty."
      end
      @revisions = value.split(",")
    end
    opts.on("-b", '--before [COMMAND]', 'Specify command to run before each benchmark run. e.g. bundle install') do |value|
      @before_command = value
    end

    opts.on_tail('-h', '--help', 'Show this help') do
      output opts
      exit
    end
  end
  parser.parse!(args)
  @file = args.first or raise Error, 'File not specified'
end

Class Method Details

.color(text, color_string) ⇒ Object 



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# File 'lib/diffbench.rb', line 133

def self.color(text, color_string)
  code = COLORS[color_string]
  self.color_enabled? ? "\e[#{code}m#{text}\e[0m" : text
end

.color_enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/diffbench.rb', line 138

def self.color_enabled?
  true
end

Instance Method Details

#improvement_percentage(before_patch, after_patch) ⇒ Object 



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# File 'lib/diffbench.rb', line 129

def improvement_percentage(before_patch, after_patch)
  (((before_patch.real - after_patch.real).to_f / before_patch.real) * 100).round
end

#print_results(results) ⇒ Object 



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# File 'lib/diffbench.rb', line 68

def print_results(results)
  output ""
  #TODO set caption the right way
  caption = "Before patch: ".gsub(/./, " ") +  Benchmark::Tms::CAPTION
  output caption
  tests = results.values.first.keys
  tests.each do |test|
    output(("-" * (caption.size - test.size)) + test)
    results.each do |revision, benchmark|
      output "#{revision}: #{benchmark[test].format}"
    end
    #TODO set improvement
    #improvement = improvement_percentage(before_patch, after_patch)
    #color_string = result_color(improvement)
    #output self.class.color("Improvement: #{improvement}%", color_string).strip
    output ""
  end
end

#run ⇒ Object 



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# File 'lib/diffbench.rb', line 42

def run
  if @revisions
    run_revisions
  else
    run_current_head
  end
end

#run_current_head ⇒ Object 



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# File 'lib/diffbench.rb', line 87

def run_current_head
  output "Running benchmark with current working tree"
  first_run = run_file
  if tree_dirty?
    output "Stashing changes"
    git_run "stash"
    output "Running benchmark with clean working tree"
    begin
      second_run = run_file
    ensure
      output "Applying stashed changes back"
      git_run "stash pop"
    end
  elsif branch = current_head
    output "Checkout HEAD^"
    git_run "checkout 'HEAD^'"
    output "Running benchmark with HEAD^"
    begin
      second_run = run_file
    ensure
      output "Checkout to previous HEAD again"
      git_run "checkout #{branch}"
    end
  else
    raise Error, "No current branch."
  end
  output ""
  caption = "Before patch: ".gsub(/./, " ") +  Benchmark::Tms::CAPTION
  output caption
  first_run.keys.each do |test|
    output(("-" * (caption.size - test.size)) + test)
    before_patch = second_run[test]
    after_patch = first_run[test]
    improvement = improvement_percentage(before_patch, after_patch)
    color_string = result_color(improvement)
    output "After patch:  #{after_patch.format}"
    output "Before patch: #{before_patch.format}"
    output self.class.color("Improvement: #{improvement}%", color_string).strip
    output ""
  end
end

#run_revisions ⇒ Object 



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# File 'lib/diffbench.rb', line 50

def run_revisions
  branch = current_head
  
  results = begin
    @revisions.inject({}) do |result, revision|
      output "Checkout to #{revision}"
      output "Run benchmark with #{revision}"
      git_run("checkout '#{revision}'")
      result[revision] = run_file
      result
    end
  ensure
    output "Checkout to #{branch}"
    git_run("checkout '#{branch}'")
  end
  print_results(results)
end