From 99cdb88bc64063dc4656ae53496f06fb2a394cd4 Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Fri, 30 Dec 2022 00:41:31 -0500
Subject: [PATCH] Improve horizontal scrolling performance of :Git blame

References: https://github.com/tpope/vim-sensible/pull/124
---
 autoload/fugitive.vim | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index 272efcb..105cfe5 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -7156,6 +7156,9 @@ function! fugitive#BlameSyntax() abort
     return
   endif
   let seen = {}
+  for x in split('01234567890abcdef', '\zs')
+    exe 'syn match FugitiveblameHashGroup'.x '"\%(^\^\=[*?]*\)\@<='.x.'\x\{5,\}\>" nextgroup=FugitiveblameAnnotation,FugitiveblameOriginalLineNumber,fugitiveblameOriginalFile skipwhite'
+  endfor
   for lnum in range(1, line('$'))
     let orig_hash = matchstr(getline(lnum), '^\^\=[*?]*\zs\x\{6\}')
     let hash = orig_hash
@@ -7177,8 +7180,8 @@ function! fugitive#BlameSyntax() abort
     else
       let s:hash_colors[hash] = ''
     endif
-    let pattern = substitute(orig_hash, '^\(\x\)\x\(\x\)\x\(\x\)\x$', '\1\\x\2\\x\3\\x', '') . '*\>'
-    exe 'syn match FugitiveblameHash'.hash.'       "\%(^\^\=[*?]*\)\@<='.pattern.'" nextgroup=FugitiveblameAnnotation,FugitiveblameOriginalLineNumber,fugitiveblameOriginalFile skipwhite'
+    let pattern = substitute(orig_hash, '^\(\x\)\x\(\x\)\x\(\x\)\x$', '\1\\x\2\\x\3\\x', '') . '*'
+    exe 'syn match FugitiveblameHash'.hash.'       "\%(^\^\=[*?]*\)\@<='.pattern.'" contained containedin=FugitiveblameHashGroup' . orig_hash[0]
   endfor
   syn match FugitiveblameUncommitted "\%(^\^\=[?*]*\)\@<=\<0\{7,\}\>" nextgroup=FugitiveblameAnnotation,FugitiveblameScoreDebug,FugitiveblameOriginalLineNumber,FugitiveblameOriginalFile skipwhite
   call s:BlameRehighlight()