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Benchmark: timing 1000000 iterations of i_noop, i_peers, i_sep...
i_noop: 13.0096 wallclock secs (10.13 usr + 2.89 sys = 13.02 CPU)
+ @ 76804.92/s (n=1000000)
...
i_peers 43215/s -- -1% -2%
i_noop 43537/s 1% -- -1%
i_sep 43927/s 2% 1% --