diff --git a/jedi/cache.py b/jedi/cache.py
index 45011871..6b2a4601 100644
--- a/jedi/cache.py
+++ b/jedi/cache.py
@@ -8,10 +8,16 @@ time_caches = []
 
 star_import_cache = {}
 
+# for fast_parser, should never be deleted
+parser_cache = {}
+
 
 def clear_caches(delete_all=False):
     """ Jedi caches many things, that should be completed after each completion
     finishes.
+
+    :param delete_all: Deletes also the cache that is normally not deleted,
+        like parser cache, which is important for faster parsing.
     """
     global memoize_caches
 
@@ -31,6 +37,7 @@ def clear_caches(delete_all=False):
         global time_caches
         time_caches = []
         star_import_cache.clear()
+        parser_cache.clear()
 
 
 def memoize_default(default=None, cache=memoize_caches):
diff --git a/jedi/fast_parser.py b/jedi/fast_parser.py
index 839090ee..e54c68b9 100644
--- a/jedi/fast_parser.py
+++ b/jedi/fast_parser.py
@@ -4,8 +4,7 @@ import operator
 from _compatibility import use_metaclass, reduce, property
 import settings
 import parsing
-
-parser_cache = {}
+import cache
 
 
 class Module(parsing.Simple, parsing.Module):
@@ -140,12 +139,12 @@ class CachedFastParser(type):
     def __call__(self, code, module_path=None, user_position=None):
         if not settings.fast_parser:
             return parsing.PyFuzzyParser(code, module_path, user_position)
-        if module_path is None or module_path not in parser_cache:
+        if module_path is None or module_path not in cache.parser_cache:
             p = super(CachedFastParser, self).__call__(code, module_path,
                                                             user_position)
-            parser_cache[module_path] = p
+            cache.parser_cache[module_path] = p
         else:
-            p = parser_cache[module_path]
+            p = cache.parser_cache[module_path]
             p.update(code, user_position)
         return p