v4.2: Update obligations.py

obligations.py

@@ -85,11 +85,26 @@ _PRIORITY_MAP = {
     "delivery": 1,
 }
 
+# FIX v4.2: Pre-compile obligation patterns at module level (was recompiling per sentence)
+_OBLIGATION_PATTERNS_COMPILED = {
+    otype: [re.compile(p, re.IGNORECASE) for p in patterns]
+    for otype, patterns in OBLIGATION_PATTERNS.items()
+}
+
+# FIX v4.2: Pre-compile false positive patterns
+_FALSE_POSITIVE_PATTERNS_COMPILED = [re.compile(p, re.IGNORECASE) for p in _FALSE_POSITIVE_PATTERNS]
+
+# FIX v4.2: Pre-compile time patterns
+_TIME_PATTERNS_COMPILED = [(re.compile(p, re.IGNORECASE), ptype) for p, ptype in TIME_PATTERNS]
+
+# FIX v4.2: Pre-compile party patterns
+_PARTY_PATTERNS_COMPILED = [re.compile(p) for p in PARTY_PATTERNS]
+
 
 def _is_false_positive(sentence):
     """Check if a sentence is a common false positive (definition/interpretation, not obligation)."""
-    for fp in _FALSE_POSITIVE_PATTERNS:
-        if re.search(fp, sentence, re.IGNORECASE):
+    for fp in _FALSE_POSITIVE_PATTERNS_COMPILED:
+        if fp.search(sentence):
             return True
     return False
 
@@ -111,9 +126,9 @@ def extract_obligations(text):
             continue
 
         found_types = set()
-        for otype, patterns in OBLIGATION_PATTERNS.items():
+        for otype, patterns in _OBLIGATION_PATTERNS_COMPILED.items():
             for pat in patterns:
-                if re.search(pat, sentence, re.IGNORECASE):
+                if pat.search(sentence):
                     found_types.add(otype)
                     break
 
@@ -128,8 +143,8 @@ def extract_obligations(text):
             party = obligation_direction
         else:
             # Fallback to pattern matching within the sentence
-            for pp in PARTY_PATTERNS:
-                m = re.search(pp, sentence)
+            for pp in _PARTY_PATTERNS_COMPILED:
+                m = pp.search(sentence)
                 if m:
                     candidate = m.group(0).strip()
                     # Fix 8: Reject party strings >40 chars (header bleed-through)
@@ -140,8 +155,8 @@ def extract_obligations(text):
         # Extract timeframe
         deadline = "Not specified"
         deadline_urgency = 0
-        for pat, ptype in TIME_PATTERNS:
-            m = re.search(pat, sentence, re.IGNORECASE)
+        for pat, ptype in _TIME_PATTERNS_COMPILED:
+            m = pat.search(sentence)
             if m:
                 if ptype == "relative":
                     num = m.group(1)