Caching for DN parsing and stringprep

ldapserver/dn.py

@@ -16,6 +16,7 @@ Limitations:
 
 import typing
 import re
+import functools
 
 from . import exceptions
 
@@ -45,6 +46,7 @@ class DN(tuple):
 	# distinguishedName = [ relativeDistinguishedName *( COMMA relativeDistinguishedName ) ]
 
 	@classmethod
+	@functools.lru_cache(maxsize=128, typed=False)
 	def from_str(cls, schema, expr):
 		'''Parse string representation of a DN according to RFC 4514
 

ldapserver/rfc4518_stringprep.py

 import unicodedata
 import stringprep
 import enum
+import functools
 
 SPACE = 0x0020
 
@@ -159,6 +160,7 @@ class SubstringType(enum.Enum):
 	ANY = enum.auto()
 	FINAL = enum.auto()
 
+@functools.lru_cache(maxsize=128, typed=False)
 def prepare(value, matching_type=MatchingType.EXACT_STRING,
             substring_type=SubstringType.NONE):
 	# Algortihm according to RFC 4518

ldapserver/schema/types.py

@@ -543,3 +543,6 @@ class Schema(OIDDict):
 		                   matching_rule_definitions=value.matching_rule_definitions,
 		                   attribute_type_definitions=value.attribute_type_definitions,
 		                   object_class_definitions=value.object_class_definitions)
+
+	def __hash__(self):
+		return id(self)