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# -*- ruby encoding: utf-8 -*-
if RUBY_VERSION < '2.1'
$stderr.puts "Cannot count allocations on #{RUBY_VERSION}."
exit 1
end
begin
require 'allocation_tracer'
rescue LoadError
$stderr.puts "Allocation tracking requires the gem 'allocation_tracer'."
exit 1
end
module Benchmarks
class LoadAllocations
def self.report(columnar: false, top_x: nil, mime_types_only: false)
new(columnar: columnar, top_x: top_x, mime_types_only: mime_types_only).
report
end
def initialize(columnar: false, top_x: nil, mime_types_only: false)
@columnar = columnar
@mime_types_only = !!mime_types_only
@top_x = top_x
if @top_x
@top_x = top_x.to_i
@top_x = 10 if @top_x <= 0
end
end
def report
collect
report_top_x if @top_x
puts "TOTAL Allocations: #{@count}"
end
private
def report_top_x
table = @allocations.sort_by { |_, v| v.first }.reverse.first(@top_x)
table.map! { |(location, allocs)|
next if @mime_types_only and location.first !~ %r{mime-types/lib}
[ location.join(':').gsub(%r{^#{Dir.pwd}/}, ''), *allocs ]
}.compact!
head = (ObjectSpace::AllocationTracer.header - [ :line ]).map {|h|
h.to_s.split(/_/).map(&:capitalize).join(' ')
}
table.unshift head
max_widths = [].tap do |mw|
table.map { |row| row.lazy.map(&:to_s).map(&:length).to_a }.tap do |w|
w.first.each_index do |i|
mw << w.lazy.map { |r| r[i] }.max
end
end
end
pattern = [ "%%-%ds" ]
pattern << ([ "%% %ds" ] * (max_widths.length - 1))
pattern = pattern.join("\t") % max_widths
table.each { |row| puts pattern % row }
puts
end
def collect
if @columnar
@allocations = ObjectSpace::AllocationTracer.trace do
require 'mime/types/columnar'
end
else
@allocations = ObjectSpace::AllocationTracer.trace do
require 'mime/types'
end
end
@count = ObjectSpace::AllocationTracer.allocated_count_table.values.
inject(:+)
end
end
end
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