Percent-decode each line only once

youtube-extract

@@ -114,10 +114,11 @@ for origLine in sys.stdin:
 	origLine = origLine.strip()
 	line = re.sub(r'https?://', '//', origLine)
 	line = domainPattern.sub('/www.youtube.com/', line)
+	decodedLine = percentdecode(line)
 	hadMatches = False
 	for pattern, paramSearch, f in matchers:
 		results = set()
-		for m in itertools.chain((x for x in pattern.finditer(line)), (x for x in pattern.finditer(percentdecode(line))) if paramSearch else ()):
+		for m in itertools.chain((x for x in pattern.finditer(line)), (x for x in pattern.finditer(decodedLine)) if paramSearch else ()):
 			hadMatches = True
 			r = f(m)
 			if r in results: