Echo JS 0.11.0

Would suggest taking a look at Steve Souders' books[1] on website performance. While they're a bit old at this point, there's a lot to gain from them.  As always, if you're really concerned about performance, write test cases for your assertions, as you may be surprised that your "optimization" does more harm than good.

As always, premature optimization is often a waste of time... optimize when you experience issues as writing more obtuse or difficult to understand code/structures will often work against you if you aren't writing apps for 100m+ user sites.

When in doubt, test.

[1] https://www.amazon.com/Steve-Souders/e/B001I9TVJS