/tp and portals cause one tick lasts 50-250ms(with C2ME VMP and Lithium), while waystone teleport causes it lasts over 1000ms.

This isn't really actionable, performance mods usually make very invasive changes and achieving the same performance in mod code would make the code significantly more complex.

It's up to Vanilla Minecraft to implement asynchronous teleports natively, until then this is out of scope. I would also argue that times as long as you're experiencing are down to the individual environment and not the normal case.