You might want to exclude the default package folders from your Sublime workspace. This way the precompiled or massive library files will not be shown in the navigation or search of your own development.
Edit your user settings by either going to Sublime Text > Preferences > Settings - User or pressing Cmd-, (in OSX).
Add the folder exclusions to the settings:
"folder_exclude_patterns": [".sass-cache", ".tmp", "node_modules", "bower_components"]