From f86f1e810390ebe6aec3170deb7a9036734466e2 Mon Sep 17 00:00:00 2001
From: Christian Brabandt <cb@256bit.org>
Date: Mon, 26 Jun 2017 10:01:00 +0200
Subject: [PATCH] whitespace: Only refresh on changes to buffer

Should prevent too many redraws of Vim
---
 autoload/airline/extensions/whitespace.vim | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/autoload/airline/extensions/whitespace.vim b/autoload/airline/extensions/whitespace.vim
index 861fb280..cc6609cf 100644
--- a/autoload/airline/extensions/whitespace.vim
+++ b/autoload/airline/extensions/whitespace.vim
@@ -156,8 +156,12 @@ function! airline#extensions#whitespace#init(...)
 endfunction
 
 function! s:ws_refresh()
+  if get(b:, 'airline_ws_changedtick', 0) == b:changedtick
+    return
+  endif
   unlet! b:airline_whitespace_check
   if get(g:, 'airline_skip_empty_sections', 0)
     exe ':AirlineRefresh'
   endif
+  let b:airline_ws_changedtick = b:changedtick
 endfunction