v4.2: Update compliance.py

compliance.py

@@ -23,6 +23,9 @@ _NEGATION_PATTERNS = [
     r"notwithstanding.*(?:shall\s+not|does\s+not|is\s+not)",
 ]
 
+# FIX v4.2: Pre-compile negation patterns at module level
+_NEGATION_PATTERNS_COMPILED = [re.compile(p, re.IGNORECASE) for p in _NEGATION_PATTERNS]
+
 # Regulatory requirement definitions
 REGULATIONS = {
     "GDPR": {
@@ -214,13 +217,13 @@ def _check_negation(text_lower, keyword, window=200):
     wider_context = text_lower[start:end]
 
     # Check sentence first (higher confidence)
-    for neg_pat in _NEGATION_PATTERNS:
-        if re.search(neg_pat, sentence, re.IGNORECASE):
+    for neg_pat in _NEGATION_PATTERNS_COMPILED:
+        if neg_pat.search(sentence):
             return True
 
     # Then check wider window (lower confidence, still relevant)
-    for neg_pat in _NEGATION_PATTERNS[:4]:  # Only strong negation patterns for wider window
-        if re.search(neg_pat, wider_context, re.IGNORECASE):
+    for neg_pat in _NEGATION_PATTERNS_COMPILED[:4]:  # Only strong negation patterns for wider window
+        if neg_pat.search(wider_context):
             return True
 
     return False