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どこかがそこはかとなくおそい

$ for i in `seq 1 100`; do curl -w '%{time_namelookup} %{time_connect} %{time_pretransfer} %{time_starttransfer}\n' -so /dev/null http://ping-us.herokuapp.com/ & done 2>&1 | tail; wait
0.006868 0.007643 0.007733 0.459956
0.520055 0.521260 0.521351 0.786516
0.259188 0.259931 0.260020 0.728914
0.004247 0.004937 0.005044 0.465556
0.028849 0.030316 0.030396 1.161605
0.030571 0.031280 0.031386 1.201964
0.008830 0.009904 0.009989 1.666734
0.264792 0.266057 0.266156 1.927201
0.037221 0.038002 0.038094 5.984547
0.060951 0.064512 0.064605 6.230670