Path 1: 84 calls (1.0)

→ f BytesIO (45) BufferedReader (36) BufferedRandom (2) UnseekableIO (1)

→ prepend bytes (84)

4 run 0 not run

1def __init__(self, f, prepend=b''):
2        self._buffer = prepend
3        self._length = len(prepend)
4        self.file = f
5        self._read = 0