Cache parser object in zc/buildout/buildout.py:_open() in memory to accelerate extends.

CHANGES.SlapOS.txt

+1.7.1-dev-SlapOS-004
+--------------------
+
+- Cache parser object in zc/buildout/buildout.py:_open() in memory to accelerate extends.
+
 1.7.1-dev-SlapOS-003
 --------------------
 

setup.py

@@ -12,7 +12,7 @@
 #
 ##############################################################################
 name = "zc.buildout"
-version = "1.7.1-dev-SlapOS-003"
+version = "1.7.1-dev-SlapOS-004"
 
 import os
 from setuptools import setup

src/zc/buildout/buildout.py

@@ -1691,6 +1691,7 @@ def _save_options(section, options, f):
     for option in sorted(options.keys()):
         _save_option(option, options.get(option), f)
 
+_open_parser_cache = {}
 def _open(base, filename, seen, dl_options, override, downloaded):
     """Open a configuration file and return the result as a dictionary,
 
@@ -1741,9 +1742,12 @@ def _open(base, filename, seen, dl_options, override, downloaded):
 
     result = {}
 
-    parser = ConfigParser.RawConfigParser()
-    parser.optionxform = lambda s: s
-    parser.readfp(fp)
+    parser = _open_parser_cache.get(filename)
+    if parser is None:
+        parser = ConfigParser.RawConfigParser()
+        parser.optionxform = lambda s: s
+        parser.readfp(fp)
+        _open_parser_cache[filename] = parser
     if is_temp:
         fp.close()
         os.remove(path)