Syntax: Emoji faster conceal with keyword

autoload/vimwiki/emoji.vim

@@ -1768,8 +1768,9 @@ endfunction
 
 " Conceal
 function! vimwiki#emoji#apply_conceal() abort
+  syn iskeyword 0-9,a-z,A-Z,:-:
   for [name, emoji] in items(s:emoji_single)
-    exe 'syn match VimwikiEmoji ":' . name . ':" conceal cchar=' . emoji
+    exe 'syn keyword VimwikiEmoji :' . name . ': conceal cchar=' . emoji
   endfor
 endfunction
 

doc/vimwiki.txt

@@ -3579,7 +3579,7 @@ The default is %%%s.
 ------------------------------------------------------------------------------
 *g:vimwiki_emoji_enable*
 
-Bitfield: Enable/disable emoji conceal and complete (with |i_CTRL-X_CTRL-U|).
+Bitfield: Enable/disable emoji conceal and complete
 Note that the |completefunc| is only set if it does not exists already to keep
 other plugin works by default. It can be set it manualy with: >
   set completefunc=vimwiki#emoji#complete
@@ -3592,7 +3592,7 @@ Emoji features hard copied from https://github.com/junegunn/vim-emoji
 Value           Description~
 0               Disable emoji support
 1               Enable emoji conceal
-2               Enable emoji complete
+2               Enable emoji complete (with |i_CTRL-X_CTRL-U|)
 3               Enable both
 
 Default: 3

syntax/vimwiki.vim

@@ -347,12 +347,6 @@ let s:typeface_dic = vimwiki#vars#get_syntaxlocal('dTypeface')
 call vimwiki#u#hi_typeface(s:typeface_dic)
 
 
-" Emoji: :dog: (after tags to take precedence)
-if and(vimwiki#vars#get_global('emoji_enable'), 1) != 0 && has('conceal')
-  call vimwiki#emoji#apply_conceal()
-endif
-
-
 " Link highlighting groups
 """"""""""""""""""""""""""
 
@@ -513,4 +507,11 @@ for u in syntax_dic.dTypeface.eq
         \ . ' keepend oneline '. b:vimwiki_syntax_concealends
 endfor
 
+" Emoji: :dog: (after tags to take precedence, after nested to not be reset)
+if and(vimwiki#vars#get_global('emoji_enable'), 1) != 0 && has('conceal')
+  call vimwiki#emoji#apply_conceal()
+  exe 'syn iskeyword '.&iskeyword.',-,:'
+endif
+
+
 syntax spell toplevel