From f6654fa0db0e6d950f501cd22df3d0526036709e Mon Sep 17 00:00:00 2001
From: todesking <discommunicative@gmail.com>
Date: Tue, 8 Apr 2014 01:06:33 +0900
Subject: [PATCH 1/1] Foldmethod: more performance

---
 after/ftplugin/markdown.vim | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/after/ftplugin/markdown.vim b/after/ftplugin/markdown.vim
index 997ab9d..497a5a2 100644
--- a/after/ftplugin/markdown.vim
+++ b/after/ftplugin/markdown.vim
@@ -16,26 +16,27 @@ func! s:effective_line(lnum)
 endfunc
 
 func! Foldexpr_markdown(lnum)
-    if (a:lnum == 1)
-        let l0 = ''
-    else
-        let l0 = s:effective_line(a:lnum-1)
-    endif
-
-    let l1 = s:effective_line(a:lnum)
-
     let l2 = s:effective_line(a:lnum+1)
-
     if  l2 =~ '^==\+\s*'
         " next line is underlined (level 1)
         return '>1'
     elseif l2 =~ '^--\+\s*'
         " next line is underlined (level 2)
         return '>2'
-    elseif l1 =~ '^#'
+    endif
+
+    let l1 = s:effective_line(a:lnum)
+    if l1 =~ '^#'
         " don't include the section title in the fold
         return '-1'
-    elseif l0 =~ '^#'
+    endif
+
+    if (a:lnum == 1)
+        let l0 = ''
+    else
+        let l0 = s:effective_line(a:lnum-1)
+    endif
+    if l0 =~ '^#'
         " current line starts with hashes
         return '>'.matchend(l0, '^#\+')
     else
-- 
2.39.5