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Bug #14908 ยป lazy_test.rb

Benchmark File - chopraanmol1 (Anmol Chopra), 07/11/2018 01:09 PM

 
require 'memory_profiler'
require 'benchmark'

N = 100
def test_lazy(array)
Benchmark.bm(10) do |r|
l = r.report('Lazy:') do
N.times do
array.lazy.map { |x| x * 10 }.map { |x| x * 100 }.map { |x| x * 100 }.each { |x| x * 1000 }
end
end
s = r.report('Normal:') do
N.times do
array.map { |x| x * 10 }.map { |x| x * 100 }.map { |x| x * 100 }.each { |x| x * 1000 }
end
end
[l / s]
end
end
def test_memory(name, arr)
puts "+"*50
puts name
report = MemoryProfiler.report do
arr.map { |x| x * 10 }.map { |x| x * 100 }.map { |x| x * 100 }.each { |x| x * 1000 }
end

puts "Total allocated: #{report.total_allocated_memsize} bytes (#{report.total_allocated} objects)"
puts "Total retained: #{report.total_retained_memsize} bytes (#{report.total_retained} objects)"
puts

puts "allocated memory by class"
puts "-"*50
report.allocated_memory_by_class.each do |item|
puts "#{item[:count].to_s.rjust(10)} #{item[:data]}"
end
puts
puts "allocated objects by class"
puts "-"*50
report.allocated_objects_by_class.each do |item|
puts "#{item[:count].to_s.rjust(10)} #{item[:data]}"
end
puts "+"*50
end

arr = [1,2,3]*1000
test_lazy(arr)
test_memory('Lazy:', arr.lazy)
test_memory('Normal:', arr)


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