Function definition inside let-block impacting performance?

[abraemer]

I think this could be a variation of the problem in this recent thread

Different result of `===` between `@runtest` and REPL

Actually I changed my mind and now think this is intended. From the manual on scopes (emphasis mine): A new local scope is introduced by most code blocks (see above table for a complete list). If such a block is syntactically nested inside of another local scope, the scope it creates is nested inside of all the local scopes that it appears within, which are all ultimately nested inside of the global scope of the module in which the code is evaluated. **Variables in outer scopes are visible fro…

But I am too tired to see how the connection is exactly.