Re: Optimising Elisp code [again]

[Barry Margolin]

In article <mailman.1852.1539009893.1284.help-gnu-emacs@gnu.org>,
 <tomas@tuxteam.de> wrote:

> On Mon, Oct 08, 2018 at 04:11:14PM +0200, Emanuel Berg wrote:
> > Garreau, Alexandre wrote:
> > 
> > > I kind of forgot why jumps are slow
> > 
> > Isn't it as simple as all the overhead of
> > placing the new function on the stack with
> > return pointers and stuff?
> 
> And cold caches, and pipeline stalls and...
> 
> Modern processors are quite complex beasts, and much of it has to
> do with the sad fact that RAM is much, much, MUCH slower than the
> CPU, and they try to lie to you about it...

Since we're talking about a byte-code interpreter, not machine code, the 
pipeline is probably not relevant.

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***