Build time on Windows 7 64: cocos2d-2.0-rc2-x-2.0.1 VS cocos2d-x-2.1.5


I am new to Cocos2d-x.

I am face this, search anywhere but can not solve this.
I create a HelloWorld project both in cocos2d-2.0-rc2-x-2.0.1 and cocos2d-x-2.1.5, import to Eclipse and start build, follow this:

With project from cocos2d-2.0-rc2-x-2.0.1 it’s take 5 seconds.
With project from cocos2d-x-2.1.5 it’s take 7 minutes.

My laptop: Core i3 380M, 6GB Ram.

I don’t know why it’s too slow with cocos2d-x-2.1.5, i wan to code game with Eclipse, not VS or Xcode.