[ESS] font color in Sweave file and slowness in inferior mode issues

[Samuele Carcagno]

Hi Alex,

> 
> There are a lot of very hard-to-fix design bugs in ESS's implementation
> of noweb/sweave. We're encouraging users to switch to polymode.[1] Can
> you try that out and see if it fixes your issues?
> 
> Thanks,
> Alex
> 
> Footnotes:
> [1]  https://polymode.github.io/installation/

many thanks for the advice, I installed polymode and put the following 
in my .emacs:

(add-to-list 'auto-mode-alist '("\\.md" . poly-markdown-mode))
(add-to-list 'auto-mode-alist '("\\.Snw" . poly-noweb+r-mode))
(add-to-list 'auto-mode-alist '("\\.Rnw" . poly-noweb+r-mode))
(add-to-list 'auto-mode-alist '("\\.Rmd" . poly-markdown+r-mode))

I suppose that's all that was needed to set it up because it seems to 
load properly when I open an ".Rnw" file and things seem to be running 
smoothly so far.

Best,

Sam