Verified on 4.5.0-0.nightly-2020-03-10-123441 olm-operator is basically steady at 20% of 1 core - it does drop off regularly but spends most of the time around 20%. I'll attach a screenshot from grafana.
Created attachment 1669134 [details] olm-operator CPU
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:2409