nXML mode too slow

[wasphin]

The nXML-mode is so slow that I can not even move cursor up and down.

And this seems not the same as #6689.

- timer-event-handler                                           10691  74%
 - apply                                                        10689  74%
  - sp-show--pair-function                                      10296  71%
   - #<compiled 0x17140b9>                                      10284  71%
    - sp-get-thing                                              10260  71%
     - sp-get-expression                                         9445  65%
      - sp-get-stringlike-or-textmode-expression                 9442  65%
       - sp-get-textmode-stringlike-expression                   9427  65%
        - sp--find-next-textmode-stringlike-delimiter               8820  61%
           sp--search-backward-regexp                            8749  60%
           sp--search-forward-regexp                               48   0%
         + sp-get-pair                                             11   0%
           sp--skip-match-p                                         4   0%
           match-string-no-properties                               1   0%
        + sp--get-allowed-stringlike-list                         509   3%
        + sp--textmode-stringlike-regexp                           72   0%
          -map                                                      1   0%
      + sp--get-stringlike-regexp                                   2   0%
      + sp--get-allowed-regexp                                      1   0%
       sp--looking-back                                           565   3%
     + sp-skip-forward-to-symbol                                    7   0%
     + sp--maybe-init                                               2   0%
     + sp--get-allowed-pair-list                                    2   0%
     + sp-skip-backward-to-symbol                                   1   0%
     + sp--get-closing-regexp                                       1   0%
    + sp-show--pair-echo-match                                     24   0%
   + sp--get-stringlike-regexp                                      5   0%
   + sp--get-allowed-pair-list                                      3   0%
   + sp--get-allowed-regexp                                         2   0%
     sp--looking-back                                               1   0%
  + rng-validate-while-idle                                       227   1%
  + require                                                       112   0%
  + rng-validate-quick-while-idle                                  26   0%
  + mouse-avoidance-fancy                                          19   0%
  + #<lambda 0x1671108e>                                            4   0%
 + timer-activate-when-idle                                         2   0%
+ normal-top-level                                               2887  20%
+ redisplay_internal (C function)                                 380   2%
+ command-execute                                                 325   2%
+ ...                                                              92   0%
+ sp--save-pre-command-state                                        3   0%
+ evil-escape-pre-command-hook                                      1   0%
  sp--post-command-hook-handler                                     1   0%

System Info 💻

• OS: gnu/linux
• Emacs: 25.3.2
• Spacemacs: 0.200.13
• Spacemacs branch: master (rev. c7a103a)
• Graphic display: t
• Distribution: spacemacs
• Editing style: emacs
• Completion: helm
• Layers:

(auto-completion
 (c-c++ :variables c-c++-enable-clang-support t)
 emacs-lisp go html javascript latex lua markdown octave python sql version-control)

• System configuration features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11

[Alexander-Miller]

Fuco1/smartparens#943 should fix that.

[github-actions]

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