MERGE2 slows down traffic

Look into why max and avg values for a stack with MERGE2 are slower than for a stack without MERGE2

<config>

<TCP start_port="7800" bind_addr="192.168.0.57" loopback="true"/>

<TCPPING timeout="3000" initial_hosts="192.168.0.57[7800]" port_range="3" num_initial_members="3"/>

<MERGE2 min_interval="1500" max_interval="3000" />

<FD timeout="10000" max_tries="4"/>

<VERIFY_SUSPECT timeout="5500" down_thread="false" up_thread="false"/>

<pbcast.NAKACK gc_lag="100" retransmit_timeout="600,1200,2400,4800"/>

<pbcast.STABLE stability_delay="1000" desired_avg_gossip="20000" down_thread="false" max_bytes="0" up_thread="false"/>

<pbcast.GMS print_local_addr="true" join_timeout="5000" join_retry_timeout="2000" shun="true"/>

</config>

Before your Fix: Version 2.2.8

Average receiving time(in milliseconds): 1106

Max reciving time(in milliseconds: 3266

Min reciving time(in milliseconds: 0

After your Fix: Latest from Head

Average receiving time(in milliseconds): 342

Max reciving time(in milliseconds: 1250

Min reciving time(in milliseconds: 0

<config>

<TCP start_port="7800" bind_addr="192.168.0.57" loopback="true"/>

<TCPPING timeout="3000" initial_hosts="192.168.0.57[7800]" port_range="3" num_initial_members="3"/>

<FD timeout="10000" max_tries="4"/>

<VERIFY_SUSPECT timeout="5500" down_thread="false" up_thread="false"/>

<pbcast.NAKACK gc_lag="100" retransmit_timeout="600,1200,2400,4800"/>

<pbcast.STABLE stability_delay="1000" desired_avg_gossip="20000" down_thread="false" max_bytes="0" up_thread="false"/>

<pbcast.GMS print_local_addr="true" join_timeout="5000" join_retry_timeout="2000" shun="true"/>

</config>

Before your Fix: Version 2.2.8

Average receiving time(in milliseconds): 36

Max reciving time(in milliseconds: 219

Min reciving time(in milliseconds: 0

After your Fix: Latest from Head

Average receiving time(in milliseconds): 29

Max reciving time(in milliseconds: 109

Min reciving time(in milliseconds: 0