Help with making a Delay Timers and ideas

[Mecblader]

Hello I am looking for simple, but efficient delay timers. I have tried to make some, but they often cause severe performance drops. I need it for a method that is called only once. i Have tried to make a timer with loop and using NBT data, but I can't seem to figure it out. Is there a way that I can select how fast is runs through the method.

[Mecblader]

I need it for the player because I want to tp the player and adjust the rotation when he/she types in a command, but right now it is calculation too quick to see the player move.

[coolAlias]

diesieben07 already covered the most important ways that timing is handled in Minecraft. If you want the player's view to rotate smoothly, you should probably implement a tick handler for RenderTicks (RenderTickEvent in 1.7). From there, you can simply adjust the player's rotation yaw by some increment each tick while your command or whatever is active.