On Fri, Mar 08, 2019 at 12:39:09AM -0500, Stefan Monnier wrote:

[...]

> FWIW, the usual case where lexical-binding leads to bigger&slower code
> is when you pass a lambda-expression to another function and that
> lambda-expression has free variables (in the lexical-binding case, it
> requires building a closure which is rather costly currently, whereas in
> the dynamic-binding case it relies on the dynamic-scoping instead).

Let's see if I got that right: in those cases, the code would (most
probably!) behave differently depending on the binding regime (lexical
vs dynamic), so it would be doing quite different things in each case?

Cheers
-- t