Changed circular buffer to reduce locking This is not perfect locking here, but it is only used for statistics which can survive some leakage.  Preferring speed over perfect thread locking.
Changed circular buffer to reduce locking
This is not perfect locking here, but it is only used for statistics which
can survive some leakage.  Preferring speed over perfect thread locking.

nightkid1027/kafka-net,geffzhang/kafka-net,EranOfer/KafkaNetClient,BDeus/KafkaNetClient,bridgewell/kafka-net,PKRoma/kafka-net,Jroland/kafka-net,gigya/KafkaNetClient,martijnhoekstra/kafka-net,CenturyLinkCloud/kafka-net