This article does not show a single performance measurement. Does any of this *actually* improve performance? You can't optimise if you don't measure. You're not optimising if you're not measuring.
This is an ad.
more accurately, only the reference is immutable. Nothing special happens that changes how const works with primitives vs objects.
Note the node event loop is not dissimilar to the event loop in the browser. There's a great talk explaining
the browser event loop, tasks, microtasks, etc and how they're scheduled with CSS, Animations the DOM in this talk from Jake Archibald at 2018 JSConf Asia: https://www.youtube.com/watch?v=cCOL7MC4Pl0
what does this mean
Delayed for the right reasons. This is a healthy sign.
Note that under the hood the engine uses a more diverse range of types which are swapped in and out as necessary (at least in the case of V8):
Not all of us are native english speakers.