It was observed from analysis of BF-28472 that the introduction of using transactions in ClusterServerParameterRefresher thread and the AuditSyncJob thread as part of SERVER-74107 cause timing issues when measuring performance in mongos_large_catalog_workloads, specifically for 1000_colls_fresh_mongos test case. It appears that the scheduling of these threads affects latency of some operations enough to cause a regression. A couple patches(patch1, patch2) were run for to prove this with results in screenshot attached.

One possible fix is to disable these threads from running when measuring performance.