ææ¥ãã RubyKaigi ãªã®ã§ãã¡ãã£ã¨ããå°ãã¿ãä¸ã¤ã ä¾ãã°ã0 ãã 9999 ã¾ã§ãããã·ã¥ã«é ã«å ¥ãã¾ãã h = {} 10000.times do |n| h[n] = true end ãã®ã¨ããh[9998] ã h[9999] ã¯ãh[0] ã h[1] ããé«éã§ãã ã©ã®ãããé«éãã¨ããã¨ã 1_000_000_000.times { h } # 40.8 sec (ã«ã¼ãèªä½ã®é度) 1_000_000_000.times { h[9999] } # 57.2 sec 1_000_000_000.times { h[0] } # 89.1 sech[0] 㯠89.1 - 40.8 = 48.3 nsec ãh[9999] 㯠57.2 - 40.8 = 16.4 nsec ã¨ãããã¨ã«ãªãã¾ãããªã㨠3 åãéãã*1 ãªããããªãã¨ãèµ·ããã®ã ã
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