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meoooh/different.rb

Created December 21, 2016 14:56
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different.rb
hhash = {}
(0..10000000).each{ |i| hhash[i] = rand };
parallel_sum = Parallel.map(hhash.each_slice(1000)) do |ele| # https://github.com/grosser/parallel
ele.sum{|value| value.last}
end.sum
puts parallel_sum
normal_sum = hhash.sum{|_,v| v}
puts normal_sum
parallel_sum == normal_sum # false
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same.rb
hhash = {}
(0..10000000).each{ |i| hhash[i] = 1 };
parallel_sum = Parallel.map(hhash.each_slice(1000)) do |ele| # https://github.com/grosser/parallel
ele.sum{|value| value.last}
end.sum
puts parallel_sum
normal_sum = hhash.sum{|_,v| v}
puts normal_sum
parallel_sum == normal_sum # true
@wagurano
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require 'parallel'
require 'active_support/all'

따라서 해보실 분은 위와 같이 코드를 추가해보세요.
RORLAB 슬랙 채널 http://rorlab.slackarchive.io/question_answer/-/1479210726.000646/1482365225.000055/1482365225000055/ 에서 이야기 하고 있습니다. 빅넘버와 래셔널을 참고하세요.

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