I'm importing the bootstrap for a Landing Page, but as the content is little consequently the classes I needed to use are also few.
I wanted to know if there is an automated way to filter which classes I'm using and generate a css file with them, discarding all other classes that are not being used.
I would also like to know what impact of importing the thousands of bootstrap classes into a small document that should use only a small part of the resources.
Are there any significant differences in page performance?