aptitude 0.4.4-4+b1 is very slow....

[Magicloud Magiclouds <magicloud.magiclouds@gmail.com>]

Dear all,
   I am using unstable brench.
   A few days ago, apt updated, so aptitude can not be installed. 
Yesterday, I found that aptitude was updated and can be installed, so I 
did it. Now I find out that, the new aptitude works very slow....

Thanks.