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f8f19baad0
Implementing #2745 , adding a metric to break down time from connection pending to connection established, per protocol stack. ```` $curl -s http://127.0.0.1:42183/metrics | grep nt_duration # HELP libp2p_swarm_connection_establishment_duration Time it took (locally) to finish establishing connections. # TYPE libp2p_swarm_connection_establishment_duration histogram libp2p_swarm_connection_establishment_duration_sum{role="Listener",protocols="/ip4/tcp"} 0.007 libp2p_swarm_connection_establishment_duration_count{role="Listener",protocols="/ip4/tcp"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.001"} 0 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.002"} 0 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.004"} 0 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.008"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.016"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.032"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.064"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.128"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.256"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="0.512"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Listener",protocols="/ip4/tcp",le="+Inf"} 1 lbl@chomp:~lbl $curl -s http://127.0.0.1:34283/metrics | grep nt_duration # HELP libp2p_swarm_connection_establishment_duration Time it took (locally) to finish establishing connections. # TYPE libp2p_swarm_connection_establishment_duration histogram libp2p_swarm_connection_establishment_duration_sum{role="Dialer",protocols="/ip4/tcp"} 0.009 libp2p_swarm_connection_establishment_duration_count{role="Dialer",protocols="/ip4/tcp"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.001"} 0 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.002"} 0 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.004"} 0 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.008"} 0 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.016"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.032"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.064"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.128"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.256"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="0.512"} 1 libp2p_swarm_connection_establishment_duration_bucket{role="Dialer",protocols="/ip4/tcp",le="+Inf"} 1 ````