patch 8.1.0270: checking for a Tab in a line could be faster commit https://github.com/vim/vim/commit/b31a3acce13231643b006988c1ce76b8a12b2982 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 11 14:41:55 2018 +0200 patch 8.1.0270: checking for a Tab in a line could be faster Problem: Checking for a Tab in a line could be faster. Solution: Use strchr() instead of strrchr(). (closes https://github.com/vim/vim/issues/3312)

--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -281,7 +281,7 @@ linelen(int *has_tab)
     *last = NUL;
     len = linetabsize(line);		/* get line length */
     if (has_tab != NULL)		/* check for embedded TAB */
-	*has_tab = (vim_strrchr(first, TAB) != NULL);
+	*has_tab = (vim_strchr(first, TAB) != NULL);
     *last = save;
 
     return len;