Why the file size exceed after moving ember 1.11.3 and htmlbars?

Recently, I've moved Ember Version 1.11.3. After moving this version, we could see in my file size got increased much.

I didn't use the ember-cli. Using Grunt (0.4.5).

I could see that "HTMLBars: is the reason for the increase in file size of templates. But I just want to know is there any reason to decease my file size?

Please help me out from this.