Class: Memory::Analyzer

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#result ⇒ Object (readonly)

Returns the value of attribute result.



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# File 'lib/measure.rb', line 24

def result
  @result
end

#roots ⇒ Object

Returns the value of attribute roots.



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# File 'lib/measure.rb', line 23

def roots
  @roots
end

Instance Method Details

#analyze ⇒ Object 



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# File 'lib/measure.rb', line 26

def analyze
  @result = MemoryInfo.new roots, 0, 0, 0
  @objs = {}

  queue = roots.dup

  until queue.empty?
    obj = queue.shift

    case obj
      # special treatment for some types
      # some are certainly missing from this
    when IO
      visit(obj)
    when String
      visit(obj) { @result.bytes += obj.size }
    when Fixnum
      @result.bytes += FIXNUM_SIZE
    when Array
      visit(obj) do
        @result.bytes += obj.size * REF_SIZE
        queue.concat(obj)
      end
    when Hash
      visit(obj) do
        @result.bytes += obj.size * REF_SIZE * 2
        obj.each {|k,v| queue.push(k).push(v)}
      end
    when Enumerable
      visit(obj) do
        obj.each do |o|
          @result.bytes += REF_SIZE
          queue.push(o)
        end
      end
    else
      visit(obj) do
        obj.instance_variables.each do |var|
          @result.bytes += REF_SIZE
          queue.push(obj.instance_variable_get(var))
        end
      end
    end
  end

  @result
end