bug#61726: [PATCH] Eglot: Support positionEncoding capability

[Augusto Stoffel]

On Sat, 25 Feb 2023 at 22:13, João Távora wrote:

> In eglot-move-to-lsp-abiding-column (the utf-16 sibling of this
> function) we use a binary search instead of a linear search.  I remember
> measuring a visible improvement.  I'm not sure the conditions are
> exactly the same with this one.  Could/should we do the same here?

Funnily, in the quick tests I made, Eli's function seems twice as fast
as "lsp-abiding".

Specifically, I ran the following (for each of the 3 move-to functions)
on a buffer where the first line is about 100 characters long:

(benchmark-run-compiled 10000
    (progn
      (goto-char (point-min))
      (let ((len (- (pos-eol) (point))))
        (dotimes (i len)
          (eglot-move-to-column (mod i len))))))