diff --git a/pyrogram/__init__.py b/pyrogram/__init__.py
index 39b83df7..0d0669e7 100644
--- a/pyrogram/__init__.py
+++ b/pyrogram/__init__.py
@@ -20,6 +20,8 @@ __version__ = "1.0.7"
 __license__ = "GNU Lesser General Public License v3 or later (LGPLv3+)"
 __copyright__ = "Copyright (C) 2017-2020 Dan <https://github.com/delivrance>"
 
+from concurrent.futures.thread import ThreadPoolExecutor
+
 
 class StopTransmission(StopAsyncIteration):
     pass
@@ -41,3 +43,7 @@ from .sync import idle
 
 # Save the main thread loop for future references
 main_event_loop = asyncio.get_event_loop()
+
+CRYPTO_EXECUTOR_SIZE_THRESHOLD = 512
+
+crypto_executor = ThreadPoolExecutor(2, thread_name_prefix="CryptoWorker")
diff --git a/pyrogram/connection/transport/tcp/tcp.py b/pyrogram/connection/transport/tcp/tcp.py
index b2ff5391..acc248b7 100644
--- a/pyrogram/connection/transport/tcp/tcp.py
+++ b/pyrogram/connection/transport/tcp/tcp.py
@@ -45,6 +45,7 @@ class TCP:
         self.writer = None  # type: asyncio.StreamWriter
 
         self.lock = asyncio.Lock()
+        self.loop = asyncio.get_event_loop()
 
         if proxy.get("enabled", False):
             hostname = proxy.get("hostname", None)
diff --git a/pyrogram/connection/transport/tcp/tcp_abridged_o.py b/pyrogram/connection/transport/tcp/tcp_abridged_o.py
index c7b24159..04644a63 100644
--- a/pyrogram/connection/transport/tcp/tcp_abridged_o.py
+++ b/pyrogram/connection/transport/tcp/tcp_abridged_o.py
@@ -19,6 +19,7 @@
 import logging
 import os
 
+from pyrogram import utils
 from pyrogram.crypto import aes
 from .tcp import TCP
 
@@ -55,16 +56,10 @@ class TCPAbridgedO(TCP):
 
     async def send(self, data: bytes, *args):
         length = len(data) // 4
+        data = (bytes([length]) if length <= 126 else b"\x7f" + length.to_bytes(3, "little")) + data
+        payload = await utils.maybe_run_in_executor(aes.ctr256_encrypt, data, len(data), self.loop, *self.encrypt)
 
-        await super().send(
-            aes.ctr256_encrypt(
-                (bytes([length])
-                 if length <= 126
-                 else b"\x7f" + length.to_bytes(3, "little"))
-                + data,
-                *self.encrypt
-            )
-        )
+        await super().send(payload)
 
     async def recv(self, length: int = 0) -> bytes or None:
         length = await super().recv(1)
@@ -87,4 +82,4 @@ class TCPAbridgedO(TCP):
         if data is None:
             return None
 
-        return aes.ctr256_decrypt(data, *self.decrypt)
+        return await utils.maybe_run_in_executor(aes.ctr256_decrypt, data, len(data), self.loop, *self.decrypt)
diff --git a/pyrogram/session/session.py b/pyrogram/session/session.py
index 490eea54..d46751d4 100644
--- a/pyrogram/session/session.py
+++ b/pyrogram/session/session.py
@@ -19,13 +19,12 @@
 import asyncio
 import logging
 import os
-from concurrent.futures.thread import ThreadPoolExecutor
 from datetime import datetime, timedelta
 from hashlib import sha1
 from io import BytesIO
 
 import pyrogram
-from pyrogram import __copyright__, __license__, __version__
+from pyrogram import __copyright__, __license__, __version__, utils
 from pyrogram import raw
 from pyrogram.connection import Connection
 from pyrogram.crypto import mtproto
@@ -51,7 +50,6 @@ class Session:
     MAX_RETRIES = 5
     ACKS_THRESHOLD = 8
     PING_INTERVAL = 5
-    EXECUTOR_SIZE_THRESHOLD = 512
 
     notice_displayed = False
 
@@ -69,8 +67,6 @@ class Session:
         64: "[64] invalid container"
     }
 
-    executor = ThreadPoolExecutor(2, thread_name_prefix="CryptoWorker")
-
     def __init__(
         self,
         client: "pyrogram.Client",
@@ -220,22 +216,12 @@ class Session:
         await self.start()
 
     async def handle_packet(self, packet):
-        if len(packet) <= self.EXECUTOR_SIZE_THRESHOLD:
-            data = mtproto.unpack(
-                BytesIO(packet),
-                self.session_id,
-                self.auth_key,
-                self.auth_key_id
-            )
-        else:
-            data = await self.loop.run_in_executor(
-                self.executor,
-                mtproto.unpack,
-                BytesIO(packet),
-                self.session_id,
-                self.auth_key,
-                self.auth_key_id
-            )
+        data = await utils.maybe_run_in_executor(
+            mtproto.unpack, BytesIO(packet), len(packet), self.loop,
+            self.session_id,
+            self.auth_key,
+            self.auth_key_id
+        )
 
         messages = (
             data.body.messages
@@ -375,24 +361,13 @@ class Session:
         log.debug(f"Sent:")
         log.debug(message)
 
-        if len(message) <= self.EXECUTOR_SIZE_THRESHOLD:
-            payload = mtproto.pack(
-                message,
-                self.current_salt.salt,
-                self.session_id,
-                self.auth_key,
-                self.auth_key_id
-            )
-        else:
-            payload = await self.loop.run_in_executor(
-                self.executor,
-                mtproto.pack,
-                message,
-                self.current_salt.salt,
-                self.session_id,
-                self.auth_key,
-                self.auth_key_id
-            )
+        payload = await utils.maybe_run_in_executor(
+            mtproto.pack, message, len(message), self.loop,
+            self.current_salt.salt,
+            self.session_id,
+            self.auth_key,
+            self.auth_key_id
+        )
 
         try:
             await self.connection.send(payload)
diff --git a/pyrogram/utils.py b/pyrogram/utils.py
index 4c444533..8b6242eb 100644
--- a/pyrogram/utils.py
+++ b/pyrogram/utils.py
@@ -315,3 +315,11 @@ async def parse_text_entities(
         "message": text,
         "entities": entities
     }
+
+
+async def maybe_run_in_executor(func, data, length, loop, *args):
+    return (
+        func(data, *args)
+        if length <= pyrogram.CRYPTO_EXECUTOR_SIZE_THRESHOLD
+        else await loop.run_in_executor(pyrogram.crypto_executor, func, data, *args)
+    )