From 367961b13155d01b15814a5c93009154da9fe7e1 Mon Sep 17 00:00:00 2001
From: itchyny <neknekneknek.t@gmail.com>
Date: Fri, 29 Nov 2013 12:49:45 +0900
Subject: [PATCH] cache tabline (close #48)

---
 autoload/lightline.vim | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/autoload/lightline.vim b/autoload/lightline.vim
index 3aca20d..04906df 100644
--- a/autoload/lightline.vim
+++ b/autoload/lightline.vim
@@ -3,7 +3,7 @@
 " Version: 0.0
 " Author: itchyny
 " License: MIT License
-" Last Change: 2013/11/15 12:30:33.
+" Last Change: 2013/11/29 12:48:45.
 " =============================================================================
 
 let s:save_cpo = &cpo
@@ -320,9 +320,11 @@ function! s:line(tabline, inactive)
   return _
 endfunction
 
+let [s:tabnrs, s:tabnr, s:tabline] = [-1, -1, '']
 function! lightline#tabline()
   if !has_key(s:highlight, 'tabline') | call lightline#highlight('tabline') | endif
-  return s:line(1, 0)
+  if [s:tabnrs, s:tabnr] != [tabpagenr('$'), tabpagenr()] | let [s:tabnrs, s:tabnr, s:tabline] = [tabpagenr('$'), tabpagenr(), s:line(1, 0)] | endif
+  return s:tabline
 endfunction
 
 function! lightline#tabs()