Class: SamplingProf::Sampling

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Sampling 



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# File 'lib/sampling_prof/internal.rb', line 7

def initialize
  @samples = Hash.new{|h,k| h[k] = [0, 0] }
  @call_graph = Hash.new{|h,k| h[k] = 0}
  @nodes = {}
end

Instance Method Details

#call_element(loc) ⇒ Object 



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# File 'lib/sampling_prof/internal.rb', line 45

def call_element(loc)
  [loc.path, loc.lineno, loc.label].join(":")
end

#node_id(loc) ⇒ Object 



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# File 'lib/sampling_prof/internal.rb', line 41

def node_id(loc)
  @nodes[call_element(loc)] ||= @nodes.size
end

#process(locations) ⇒ Object 



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# File 'lib/sampling_prof/internal.rb', line 17

def process(locations)
  from = -1
  paths = []
  calls = []
  top_index = locations.size - 1
  locations.reverse.each_with_index do |loc, i|
    node_id = node_id(loc)
    if i == top_index
      @samples[node_id][0] += 1
    end

    path = [from, node_id]
    if !paths.include?(path)
      paths << path
      @call_graph[path] += 1
    end
    if !calls.include?(node_id)
      calls << node_id
      @samples[node_id][1] += 1
    end
    from = node_id
  end
end

#result ⇒ Object 



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# File 'lib/sampling_prof/internal.rb', line 13

def result
  [@nodes.to_a, @samples.to_a, @call_graph.to_a]
end