* lib/irb/ruby-lex.rb: improve RubyLex performance for large files

	  [Bug #5202]. Patch by ryanmelt.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38609 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/irb/ruby-lex.rb b/lib/irb/ruby-lex.rb
index 379b4b746d..239d6b1d86 100644
--- a/lib/irb/ruby-lex.rb
+++ b/lib/irb/ruby-lex.rb
@@ -87,8 +87,8 @@ class RubyLex
   end
 
   def get_readed
-    if idx = @readed.reverse.index("\n")
-      @base_char_no = idx
+    if idx = @readed.rindex("\n")
+      @base_char_no = @readed.size - (idx + 1)
     else
       @base_char_no += @readed.size
     end
@@ -152,8 +152,8 @@ class RubyLex
     @seek -= 1
     if c == "\n"
       @line_no -= 1
-      if idx = @readed.reverse.index("\n")
-	@char_no = @readed.size - idx
+      if idx = @readed.rindex("\n")
+	@char_no = idx + 1 
       else
 	@char_no = @base_char_no + @readed.size
       end