Steps to Reproduce:
Expected Result: The measured times are a close match, provided that the systems hosting both 16.2.1 and 16.2.3 are also a close match.
Actual Result: It takes longer for the page to load in version 16.2.3, than in version 16.2.1.
The resolution is included in 16.3.1, 16.3.0.1 (patch 1), and 16.2.3.2 (patch 2).