Subject: bug#18923: Alternative scrolling model

From: Stefan Monnier <[email-masked]>
Date: Sun, 02 Nov 2014 10:56:15 -0500

>> (cl-incf ammount vscroll)
> Why not use '(setq amount (+ amount vscroll))' instead?  It should be
> marginally faster.

No, it's identical:

   (macroexpand '(cl-incf ammount vscroll))
   => (setq ammount (+ ammount vscroll))

> why is it a good idea to use cl-reduce here,

Because it's a lot more concise.

        Stefan