Regression between 3.2.x and 3.3.x/3.4.x in Infinispan read simulation ---------------------------------------------------------------------- Key: JGRP-1716 URL: https://issues.jboss.org/browse/JGRP-1716 Project: JGroups Issue Type: Bug Affects Versions: 3.3, 3.4 Reporter: Dan Berindei Assignee: Bela Ban Fix For: 3.5 Attachments: benchmark-jgroups.xml, jgroups-udp.pdf, jgroups-udp.xml Comparing JGroups 3.2/3.3/3.4 performance with Radargun, the throughput of reads in scenario simulating Infinispan went down by ~10%. See the attached chart. * getall: the get request is sent to single node (randomly picked owner) * getfirst: the get requests are sent to 2 nodes with ResponseMode.GET_FIRST - the second response is discarded. .h5 Suspects: Erik Salter profiled his application and noticed that the message parsing in the UDP receiver thread seemed to slow things down. He wrote a patch that brought his throughput back to 3.2 levels: https://github.com/an1310/JGroups/compare/t_perfhack The UDP receiver thread may not tell the whole story, however: in the Radargun tests, performance with his patch was even lower.