I don't know that it is optimal, but our team generally batches PRs once per day, to avoid interrupting them. So typically it's going to take about a half day f

I don't know that it is optimal, but our team generally batches PRs once per day, to avoid interrupting them. So typically it's going to take about a half day for a review. As different people end their day at different times. Exceptions of course, but this seems close to optimal to me (from the reviewers perspective).