From 9a55567d237f68b497d8fad0dbffa02e63c1146a Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Thu, 17 Mar 2022 01:45:37 +0900
Subject: [PATCH 1/3] Optimize s:pathshorten()

---
 autoload/ctrlp.vim | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/autoload/ctrlp.vim b/autoload/ctrlp.vim
index 1b6b8c5c..e71f1911 100644
--- a/autoload/ctrlp.vim
+++ b/autoload/ctrlp.vim
@@ -1767,11 +1767,16 @@ fu! s:formatline2(ct, key, str)
 	retu s:lineprefix.( cond ? s:pathshorten(str) : str )
 endf
 
-
-fu! s:pathshorten(str)
-	retu matchstr(a:str, '^.\{9}').'...'
-		\ .matchstr(a:str, '.\{'.( s:winw - 16 ).'}$')
-endf
+if exists('*strchars') && exists('*strcharpart')
+	fu! s:pathshorten(str)
+	  retu strcharpart(a:str, 0, 9).'...'.strcharpart(a:str, strchars(a:str) - s:winw + 16)
+	endf
+el
+	fu! s:pathshorten(str)
+		retu matchstr(a:str, '^.\{9}').'...'
+			\ .matchstr(a:str, '.\{'.( s:winw - 16 ).'}$')
+	endf
+en
 
 fu! s:offset(lines, height)
 	let s:offset = s:mw_order == 'btt' ? ( a:height - s:res_count ) : 0

From 83f1c204d0209f4782aadd22f5f5d34a43e9959e Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Thu, 17 Mar 2022 01:46:51 +0900
Subject: [PATCH 2/3] retab

---
 autoload/ctrlp.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/autoload/ctrlp.vim b/autoload/ctrlp.vim
index e71f1911..febdcc93 100644
--- a/autoload/ctrlp.vim
+++ b/autoload/ctrlp.vim
@@ -1769,7 +1769,7 @@ endf
 
 if exists('*strchars') && exists('*strcharpart')
 	fu! s:pathshorten(str)
-	  retu strcharpart(a:str, 0, 9).'...'.strcharpart(a:str, strchars(a:str) - s:winw + 16)
+		retu strcharpart(a:str, 0, 9).'...'.strcharpart(a:str, strchars(a:str) - s:winw + 16)
 	endf
 el
 	fu! s:pathshorten(str)

From f75c3291f44f4d0c11257f089475fc3682afb6cb Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Thu, 17 Mar 2022 01:57:23 +0900
Subject: [PATCH 3/3] Add small optimizations

---
 autoload/ctrlp.vim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/autoload/ctrlp.vim b/autoload/ctrlp.vim
index febdcc93..28184465 100644
--- a/autoload/ctrlp.vim
+++ b/autoload/ctrlp.vim
@@ -1762,8 +1762,9 @@ fu! s:formatline2(ct, key, str)
 				let str .= printf('  %s', parts[3])
 			en
 		en
+		retu s:lineprefix.str
 	en
-	let cond = a:ct != 'buf' &&s:ispath && ( s:winw - 4 ) < s:strwidth(str)
+	let cond = s:ispath && ( s:winw - 4 ) < strchars(str)
 	retu s:lineprefix.( cond ? s:pathshorten(str) : str )
 endf