Module: BleakHouse::Analyzer

Defined in:
lib/bleak_house/analyzer.rb

Class Method Summary collapse

Class Method Details

.diff(outputs) ⇒ Object 



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# File 'lib/bleak_house/analyzer.rb', line 35

def self.diff(outputs)
  # Calculate the diff
  diff = Hash.new(0)
  # Iterate each item
  outputs.each_with_index do |output, index|
    output[3..-1].each do |line|
      c, key = line.split(" ", 2)
      index.zero? ? diff[key] -= c.to_i : diff[key] += c.to_i
    end
  end
  # Format the lines in descending order
  diff.sort_by do |key, value|
    -value
  end.map do |key, value|
    "#{value.to_s.rjust(6)} #{key}"
  end
end

.run(*args) ⇒ Object

Analyze a compatible bleak.dump. Accepts one or more filename and the number of lines to display.



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# File 'lib/bleak_house/analyzer.rb', line 6

def self.run(*args)
  lines = args.last[/^\d+$/] ? args.pop.to_i : 20

  raise "Can't diff more than 2 files" if args.size > 2

  outputs = args.map do |file|
    filled, free = `tail -n 2 #{file}`.split("\n")
    unless filled =~ /filled/ and free =~ /free/
      raise "#{file} is incomplete or corrupted"
    end

    length = `wc #{file}`.to_i - 2
    cmd = ENV['NO_TRACE'] ? "awk -F: '{print $3}' " + file : "cat #{file}"
    cmd += " | sort | uniq -c | sort -nr | head -#{lines}"

    ["#{length} total objects", "#{filled} heap slots", "#{free} heap slots"] + `#{cmd}`.split("\n")
  end

  if outputs.size == 1
    # Just output the data
    puts "Displaying top #{lines} most common line/class pairs"
    puts outputs.first
  else
    puts "Displaying change in top #{lines} most common line/class pairs"
    puts diff(outputs)
  end

end