From b0daaa1699f3bfdb63c1ea9f601f266eb1642cca Mon Sep 17 00:00:00 2001
From: mitchell <70453897+667e-11@users.noreply.github.com>
Date: Sat, 15 Dec 2012 22:17:34 -0500
Subject: Greatly improve speed when loading large files;
 modules/textadept/mime_types.lua

---
 modules/textadept/mime_types.lua | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'modules')

diff --git a/modules/textadept/mime_types.lua b/modules/textadept/mime_types.lua
index 8193bc52..b81bdcf7 100644
--- a/modules/textadept/mime_types.lua
+++ b/modules/textadept/mime_types.lua
@@ -129,7 +129,8 @@ local function set_lexer(buffer, lang)
     if _M[lang].set_buffer_properties then _M[lang].set_buffer_properties() end
     events.emit(events.LANGUAGE_MODULE_LOADED, lang)
   end
-  buffer:colourise(0, -1)
+  local last_line = buffer.first_visible_line + buffer.lines_on_screen
+  buffer:colourise(0, buffer:position_from_line(last_line + 1))
   -- Create the ws_styles[lexer] lookup table for `get_lexer()`.
   if ws_styles[lang] then return end
   local ws = {}
-- 
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