Re: Optimising Elisp code

[Noam Postavsky]

On Thu, 4 Oct 2018 at 22:20, Davin Pearson <davin.pearson@gmail.com> wrote:
>
> On Friday, October 5, 2018 at 3:15:32 PM UTC+13, Davin Pearson wrote:
> > Suppose that you have a function:
> >
> > (defun foo ()
> >    (bar))
> >
> > And bar is a function that has no side effects and returns 123 then calling
> > the function code-optimize (the name of my optimisation routine)
> >
> > M-x code-optimize on the function foo will result in the following defun
> >
> > (defun foo ()
> >     123)
>
> Please could you admise me about whether or not such as function is part of 
> Gnu Emacs or otherwise available as a third party tool.

Not exactly, but if you use defsubst to define bar (defsubst bar ()
123), then the result of byte-compiling foo will be equivalent to your
optimized version.