views latency increase after audit commit

We are seeing an increase in views latency.

Test: 80th percentile query latency (ms). 4 nodes. 1 bucket x 20M x 2KB. non-DGM. 4 x 1 views. 500 mutations/sec/node. 400 queries/sec query_lat_20M_leto 

6.5.0-3798 - 10.6

6.5.0-3799 - 12.1

Graphs: 

http://cbmonitor.sc.couchbase.com/reports/html/?snapshot=leto_650-3798_access_ab58&snapshot=leto_650-3799_access_97d5

Logs:

3798:

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10388/leto-srv-01.perf.couchbase.com.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10388/leto-srv-02.perf.couchbase.com.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10388/leto-srv-03.perf.couchbase.com.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10388/leto-srv-04.perf.couchbase.com.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10388/tools.zip

3799:

https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10389/leto-srv-01.perf.couchbase.com.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10389/leto-srv-02.perf.couchbase.com.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10389/leto-srv-03.perf.couchbase.com.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10389/leto-srv-04.perf.couchbase.com.zip
https://s3-us-west-2.amazonaws.com/perf-artifacts/jenkins-leto-10389/tools.zip

Changelog:

http://172.23.123.43:8000/getchangelog?product=couchbase-server&fromb=6.5.0-3798&tob=6.5.0-3799

Analysis:

Not much to see from the graphs. Query latency is up across the board but nothing else besides that. Looks like it is coming from this commit: https://github.com/couchbase/couchdb/commit/e2ab44a473f219e0401f249cc667f8d9f2d30d58