[Hours]         [Activity]
2020/12/14      Monday
 0.45           review github notifications
 1.60           #18396 review, track down issue with RW mutexes
 2.08           #18396 irc discussion with khw, work on a PR with test and
                fix, back to review
=====
 4.13

2020/12/15      Tuesday
 0.35           review github notifications
 0.93           #17094 write up an approach
 2.45           #17094 research, more write up
=====
 3.73

2020/12/16      Wednesday
 0.12           #18403 review and apply to blead
 0.17           #18396 follow-up
 1.27           #18402 review and research
 0.88           #18402 more research and comment
 0.80           #17094 more editing, post
=====
 3.24

2020/12/17      Thursday
 1.37           #17094 follow-up
=====
 1.37

Which I calculate is 12.47 hours.

Approximately 4 tickets were reviewed or worked on, and 1 patches
were applied.