YCSB Workload E. MOI. SSL. X.509 throughput decrease

90%+ drop in throughput for YCSB Workload E. MOI. SSL. X.509. Looks like this is causing the issue: 

http://172.23.123.43:8000/getchangelog?product=couchbase-server&fromb=6.5.0-4424&tob=6.5.0-4425

https://github.com/couchbase/kv_engine/commit/79a67213e7278b15cc3429d7eb2546a4d2b8607e

4425 - http://perf.jenkins.couchbase.com/job/hebe/4615/ - 2082

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4615/172.23.100.190.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4615/172.23.100.191.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4615/172.23.100.192.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4615/172.23.100.193.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4615/172.23.100.204.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4615/172.23.100.205.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4615/172.23.100.206.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4615/172.23.100.207.zip

4424 - http://perf.jenkins.couchbase.com/job/hebe/4616/ - 35819

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4616/172.23.100.190.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4616/172.23.100.191.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4616/172.23.100.192.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4616/172.23.100.193.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4616/172.23.100.204.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4616/172.23.100.205.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4616/172.23.100.206.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-hebe-4616/172.23.100.207.zip

http://cbmonitor.sc.couchbase.com/reports/html/?snapshot=hebe_650-4425_access_6c8d&snapshot=hebe_650-4424_access_2d20