There are a number of Web Page performance optimizations recommendations via Chromes Developer tools. One of the critical recommendations is to optimize the order of styles and scripts. This allows parallelization of downloads by the web browser.
If the optimization is just a question of re-ordering a Velocity template then it is well worth the effort. If not this Jira can be considered documentation for the Sakai 2.9 life cycle.
Doing some really rough maths.
50 ms saved per page x 3,000,000 users x 20 (logins) x 50 pages ~ 42,000 hours saved per year.
Generated by Chrome - Developer tools - Audit