Module: MemoryProfiler::TopN

Included in:
StatHash
Defined in:
lib/memory_profiler/top_n.rb

Instance Method Summary collapse

Instance Method Details

#top_n(max, metric_method) ⇒ Object

Fast approach for determining the top_n entries in a Hash of Stat objects. Returns results for both memory (memsize summed) and objects allocated (count) as a tuple.



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# File 'lib/memory_profiler/top_n.rb', line 7

def top_n(max, metric_method)
  [
    top_n_memory(max, metric_method),
    top_n_objects(max, metric_method)
  ]
end

#top_n_memory(max, metric_method) ⇒ Object 



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# File 'lib/memory_profiler/top_n.rb', line 14

def top_n_memory(max, metric_method)
  metric_memsize = Hash.new(0)

  each_value do |value|
    metric = value.send(metric_method)
    metric_memsize[metric] += value.memsize
  end

  metric_memsize
    .to_a
    .sort_by! { |metric, memsize| [-memsize, metric] }
    .take(max)
    .map! { |metric, memsize| { data: metric, count: memsize } }
end

#top_n_objects(max, metric_method) ⇒ Object 



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# File 'lib/memory_profiler/top_n.rb', line 29

def top_n_objects(max, metric_method)
  metric_objects_count = Hash.new(0)

  each_value do |value|
    metric = value.send(metric_method)
    metric_objects_count[metric] += 1
  end

  metric_objects_count
    .to_a
    .sort_by! { |metric, count| [-count, metric] }
    .take(max)
    .map! { |metric, count| { data: metric, count: count } }
end