Re: Performance degradation from long lines

[Clément Pit-Claudel]

On 24/10/2018 19.59, mithraeum wrote:
> To me it seems that the aforementioned loss of display capabilities
> is not relevant to terminal Emacs, as it doesn't have those capabilities
> in the first place.  So none of the objections apply except those
> regarding extra maintenance and the effort to make this work.

I don't understand this part.  Eli listed the following capabilities:

* bold, italics, and other important face attributes
* Some characters are not covered by fixed-pitch fonts, so they cannot be 
displayed. The usual box-with-hex-code display of such characters will also be 
lost, so we will be left with displaying them as ? or somesuch.
* Character composition will also be lost, so bye-bye prettify-symbols-mode and 
support for some scripts that cannot be displayed without composed characters.
* Some characters (mostly from East-Asian scripts) need to be displayed at 
twice the width, so either you give up those scripts, or you are back to the 
original problem.

Many (all?) of these features are available in the terminal, too (at least the 
following: bold, underline, italics, characters that don't have fixed-pitched 
fonts, prettify-symbols-mode, and wide characters).  What did you mean by 
"terminal Emacs doesn't have those capabilities in the first place"?

Clément.