Faster RLE codec implementation (pyrogram#938)

* faster pyrogram lre encode implementation * Update file_id.py * optimized rle decode Co-authored-by: andrew (from workstation) <andrew-ld@protonmail.com> Co-authored-by: Dan <14043624+delivrance@users.noreply.github.com>

Author: andrew-ld

pyrogram/file_id.py

@@ -21,6 +21,7 @@
 import struct
 from enum import IntEnum
 from io import BytesIO
+from typing import List
 
 from pyrogram.raw.core import Bytes, String
 
@@ -63,36 +64,36 @@ def rle_encode(s: bytes) -> bytes:
  Returns:
  ``bytes``: The encoded bytes
  """
- r: bytes = b""
+ r: List[int] = []
  n: int = 0
 
  for b in s:
  if not b:
  n += 1
  else:
  if n:
- r += bytes([0, n])
+ r.extend((0, n))
  n = 0
 
- r += bytes([b])
+ r.append(b)
 
  if n:
- r += bytes([0, n])
+ r.extend((0, n))
 
- return r
+ return bytes(r)
 
 
 def rle_decode(s: bytes) -> bytes:
  """Zero-value RLE decoder
 
  Parameters:
  s (``bytes``):
- Bytes to encode
+ Bytes to decode
 
  Returns:
- ``bytes``: The encoded bytes
+ ``bytes``: The decoded bytes
  """
- r: bytes = b""
+ r: List[int] = []
  z: bool = False
 
  for b in s:
@@ -101,12 +102,12 @@ def rle_decode(s: bytes) -> bytes:
  continue
 
  if z:
- r += b"\x00" * b
+ r.extend((0,) * b)
  z = False
  else:
- r += bytes([b])
+ r.append(b)
 
- return r
+ return bytes(r)
 
 
 class FileType(IntEnum):