Minecraft FTB Mindcrack world freezing but not crashing

[BuildLikeABoss]

Hello My world has had many problems before where it would crash everytime i joined it other world worked. Now it seems to freeze. before it froze when i logged in and did something now it was after a little while when i opened a chest here is the client side log in debug mode
http://pastebin.com/u1ezaGAR

P.S i opened it to LAN and they can continue to play but my screen is frozing or something


Any Help would be greatly appeciated thanks

 

[Nessiroj]

It's more the question what goes right in your case, Yur connection is dropping / getting blocked all the time:

2013-05-30 17:14:19 [INFO] [STDERR] java.net.ConnectException: Connection timed out: connect
2013-05-30 17:14:19 [INFO] [STDERR] at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
2013-05-30 17:14:19 [INFO] [STDERR] at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
2013-05-30 17:14:19 [INFO] [STDERR] at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
2013-05-30 17:14:19 [INFO] [STDERR] at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
2013-05-30 17:14:19 [INFO] [STDERR] at java.net.AbstractPlainSocketImpl.connect(Unknown Source)

Your pc can't keep up with what your doing:

2013-05-30 17:14:47 [INFO] [STDOUT] Memory connection overburdened; after processing 2500 packets, we still have 1261 to go!

2013-05-30 17:14:56 [SEVERE] [ForgeModLoader] Detected leaking worlds in memory. There are 4 worlds that appear to be persisting. A mod is likely caching the world incorrectly
 
2013-05-30 17:14:56 [SEVERE] [ForgeModLoader] The world 2503a8f2 (pro smag bros) has leaked.
 
2013-05-30 17:14:56 [SEVERE] [ForgeModLoader] The world 136d2d02 (pro smag bros) has leaked.

 

[BuildLikeABoss]

I live in a boarding house the internet is blocked all the time but LAN works but not really if you say im getting blocked and what not. My computer is a MAcbook pro 2013 4gb one . the school runs bootcamp on it when i play on mac side i can only do this at home because there is no internet for mac here is runs a lot smother and faster. is there anything i can do because it seemed to work before but now it freezes after the "broken world" thing that happened
BTW the school has blocked pretty much everything on the computer like Run.exe dosent work CMD regedit
P.s not sure if last line is relevant.