From a85e0523f8896bbc602b29f8b04836817babf6ef Mon Sep 17 00:00:00 2001
From: Yacine Elhamer <elhamer.yacine@gmail.com>
Date: Tue, 1 Aug 2023 20:09:42 +0100
Subject: [PATCH] remove `Scopes` LRU caching

---
 capa/helpers.py        | 19 -------------------
 capa/rules/__init__.py |  6 +-----
 2 files changed, 1 insertion(+), 24 deletions(-)

diff --git a/capa/helpers.py b/capa/helpers.py
index b47d9852..07234c22 100644
--- a/capa/helpers.py
+++ b/capa/helpers.py
@@ -132,25 +132,6 @@ def redirecting_print_to_tqdm(disable_progress):
         inspect.builtins.print = old_print  # type: ignore
 
 
-def weak_lru(maxsize=128, typed=False):
-    """
-    LRU Cache decorator that keeps a weak reference to 'self'
-    """
-
-    def wrapper(func):
-        @functools.lru_cache(maxsize, typed)
-        def _func(_self, *args, **kwargs):
-            return func(_self(), *args, **kwargs)
-
-        @functools.wraps(func)
-        def inner(self, *args, **kwargs):
-            return _func(weakref.ref(self), *args, **kwargs)
-
-        return inner
-
-    return wrapper
-
-
 def log_unsupported_format_error():
     logger.error("-" * 80)
     logger.error(" Input file does not appear to be a PE or ELF file.")
diff --git a/capa/rules/__init__.py b/capa/rules/__init__.py
index 60af9ed5..ad669049 100644
--- a/capa/rules/__init__.py
+++ b/capa/rules/__init__.py
@@ -16,7 +16,7 @@ import collections
 from enum import Enum
 from pathlib import Path
 
-from capa.helpers import weak_lru, assert_never
+from capa.helpers import assert_never
 
 try:
     from functools import lru_cache
@@ -115,10 +115,6 @@ class Scopes:
     static: Optional[str] = None
     dynamic: Optional[str] = None
 
-    @weak_lru()
-    def __new__(cls, *args, **kwargs):
-        return super().__new__(cls)
-
     def __contains__(self, scope: Union[Scope, str]) -> bool:
         assert isinstance(scope, (Scope, str))
         return (scope == self.static) or (scope == self.dynamic)