Fix for player lag when handling many permissions.

[kostamax27]

If the player has many permissions he will lag

https://github.com/pmmp/PocketMine-MP/blob/04494e845c8ec9ae174604b6dde6c1cc6c22953a/src/network/mcpe/NetworkSession.php#L290-L295

[UnknownNull]

If the player has many permissions he will lag

https://github.com/pmmp/PocketMine-MP/blob/04494e845c8ec9ae174604b6dde6c1cc6c22953a/src/network/mcpe/NetworkSession.php#L290-L295

After reviewing and testing your changes, I realized that your changes apparently had no effect on fixing the lag.
If I'm wrong, convince me.

[kostamax27]

If the player has many permissions he will lag
https://github.com/pmmp/PocketMine-MP/blob/04494e845c8ec9ae174604b6dde6c1cc6c22953a/src/network/mcpe/NetworkSession.php#L290-L295

After reviewing and testing your changes, I realized that your changes apparently had no effect on fixing the lag. If I'm wrong, convince me.

After calling removeAttachment or addAttachment, the following code is executed for the player every time:

https://github.com/pmmp/PocketMine-MP/blob/37668da8a6c2ad2ce12b284bad60e993931fcfe4/src/network/mcpe/NetworkSession.php#L299-L304

Now imagine the following scenario:
the player’s privilege has more than 10 permissions, and the server has a large number of registered commands.

Due to the frequent execution of
https://github.com/pmmp/PocketMine-MP/blob/37668da8a6c2ad2ce12b284bad60e993931fcfe4/src/network/mcpe/NetworkSession.php#L299-L304
the player starts experiencing lag.