Class: DiffBench::Runner

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

Constant Summary collapse

COLORS = 
{red: 31, green: 32}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file, *args) ⇒ Runner

Returns a new instance of Runner.



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

def initialize(file, *args)
  @file = file
  unless @file
    raise Error, "File not specified"
  end
end

Class Method Details

.color(text, color_string) ⇒ Object 



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# File 'lib/diffbench.rb', line 69

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 74

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 65

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

#run ⇒ Object 



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# File 'lib/diffbench.rb', line 21

def run
  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}"
    if color_string
      output self.class.color("Improvement: #{improvement}%", color_string).strip
    end
    output ""
  end
end