Still Slow and Laggy No Mojang Logo on Start after the 0.13.1 alpha Update!

I have a map size of 559.2MB and before the update (0.13.0) I used to play okay in it. (Yes, I did report it before...

After the update and after the recent 0.13.1 alpha update game does not even start blank sky sceene and after the world loaded all really slow and laggy and it comes to I could not even turn the head of the Steve Dude!

So, whatever you guys broke on 0.13.0 update, it is not fixed on this update and more to it...

THERE IS NO MOJANG LOGO on START! But Black Square.