パフォーマンス改善 @ Ruby 2.5

Ruby 2.5 におけるパフォーマンス改善について、独断と偏見でチケットをピックアップして、Meguro.rb#10 で発表しました。
https://megurorb.connpass.com/event/74033/

Transcript

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18. w 3VCZ
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