From e28eb5198823d841deb39b0c8ff2005e8bdbf31e Mon Sep 17 00:00:00 2001
From: Oliverpool <oliverpool@hotmail.fr>
Date: Mon, 27 Jun 2016 09:08:54 +0200
Subject: [PATCH 1/3] cache the latex yacc instance

---
 patacrep/latex/syntax.py | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/patacrep/latex/syntax.py b/patacrep/latex/syntax.py
index edf9ceb1..7c76fbe2 100644
--- a/patacrep/latex/syntax.py
+++ b/patacrep/latex/syntax.py
@@ -2,6 +2,7 @@
 
 import logging
 import ply.yacc as yacc
+from functools import lru_cache
 
 from patacrep.latex import ast
 from patacrep.latex.detex import detex
@@ -211,12 +212,17 @@ def silent_yacc(*args, **kwargs):
         **kwargs
         )
 
+@lru_cache()
+def latex_yacc(filename=None):
+    """Call the yacc with the LaTeX parser.
+    """
+    parser = silent_yacc(module=LatexParser(filename))
+    return parser
+
 def tex2plain(string):
     """Parse string and return its plain text version."""
     return detex(
-        silent_yacc(
-            module=LatexParser(),
-            ).parse(
+        latex_yacc().parse(
                 string,
                 lexer=SimpleLexer().lexer,
                 )
@@ -231,7 +237,7 @@ def parse_song(content, filename=None):
       display error messages.
     """
     return detex(
-        silent_yacc(module=LatexParser(filename)).parse(
+        latex_yacc(filename).parse(
             content,
             lexer=SongLexer().lexer,
             ).metadata

From b994f91d353b0444f9418eb8837e4f4b657a7021 Mon Sep 17 00:00:00 2001
From: Oliverpool <oliverpool@hotmail.fr>
Date: Mon, 27 Jun 2016 09:15:23 +0200
Subject: [PATCH 2/3] (pylint) fix

---
 patacrep/latex/syntax.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/patacrep/latex/syntax.py b/patacrep/latex/syntax.py
index 7c76fbe2..b6daefd0 100644
--- a/patacrep/latex/syntax.py
+++ b/patacrep/latex/syntax.py
@@ -1,8 +1,8 @@
 """Very simple LaTeX parser"""
 
 import logging
-import ply.yacc as yacc
 from functools import lru_cache
+import ply.yacc as yacc
 
 from patacrep.latex import ast
 from patacrep.latex.detex import detex
@@ -223,9 +223,9 @@ def tex2plain(string):
     """Parse string and return its plain text version."""
     return detex(
         latex_yacc().parse(
-                string,
-                lexer=SimpleLexer().lexer,
-                )
+            string,
+            lexer=SimpleLexer().lexer,
+            )
         )
 
 def parse_song(content, filename=None):

From 6da41a6c947d3902471f157f289d7001b9bfa0b0 Mon Sep 17 00:00:00 2001
From: Oliverpool <oliverpool@hotmail.fr>
Date: Mon, 27 Jun 2016 09:16:11 +0200
Subject: [PATCH 3/3] update news

---
 NEWS.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/NEWS.md b/NEWS.md
index f959491d..bbc8f7af 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -15,6 +15,7 @@
     * The `meta` directive is now supported: `{meta: COMMANDNAME:arg}` [#220](https://github.com/patacrep/patacrep/pull/220)
   * LaTeX songs
     * The `meta` directive is now supported: `\metacrep{COMMANDNAME}{arg}` [#220](https://github.com/patacrep/patacrep/pull/220)
+  * Faster index generation [#233](https://github.com/patacrep/patacrep/pull/233)
 
 # patacrep 5.0.0