From be733385c9457a006da2b5d92fed0077401c3d1c Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sat, 11 Mar 2017 18:42:39 +0100
Subject: Markdown reader: optimized nonindentSpaces.

Makes the benchmark go from 40 to 36 ms.
---
 src/Text/Pandoc/Readers/Markdown.hs | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

(limited to 'src')

diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs
index 2cd1c0d83..169872391 100644
--- a/src/Text/Pandoc/Readers/Markdown.hs
+++ b/src/Text/Pandoc/Readers/Markdown.hs
@@ -133,17 +133,14 @@ indentSpaces = try $ do
 
 nonindentSpaces :: PandocMonad m => MarkdownParser m String
 nonindentSpaces = do
-  tabStop <- getOption readerTabStop
-  sps <- many (char ' ')
-  if length sps < tabStop
-     then return sps
-     else unexpected "indented line"
+  n <- skipNonindentSpaces
+  return $ replicate n ' '
 
 -- returns number of spaces parsed
 skipNonindentSpaces :: PandocMonad m => MarkdownParser m Int
 skipNonindentSpaces = do
   tabStop <- getOption readerTabStop
-  atMostSpaces (tabStop - 1) <* notFollowedBy (char ' ')
+  atMostSpaces (tabStop - 1) <* notFollowedBy spaceChar
 
 atMostSpaces :: PandocMonad m => Int -> MarkdownParser m Int
 atMostSpaces n
-- 
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