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# frozen_string_literal: true
module MemoryProfiler
module TopN
# 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.
def top_n(max, metric_method)
[
top_n_memory(max, metric_method),
top_n_objects(max, metric_method)
]
end
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
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
end
end
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