Compile PRICE_RE regex once at module level

Author: buzzkillb

price_service.py

@@ -20,6 +20,7 @@
     "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
     "Accept-Language": "en-US,en;q=0.9",
 }
+PRICE_RE = re.compile(r"\$([0-9,]+\.?[0-9]*)")
 
 
 class PriceService:
@@ -74,9 +75,7 @@ def _extract_price_after(self, html: str, prefix: str) -> Optional[float]:
             return None
 
         after = html[pos : pos + 200]
-
-        # Find $ followed by number
-        match = re.search(r"\$([0-9,]+\.?[0-9]*)", after)
+        match = PRICE_RE.search(after)
         if match:
             price_str = match.group(1).replace(",", "")
             try: