If you are concerned of the size of your personal or smaller site, run it against a popular performance testing tool.
The three that I use regularly are: (1) Yellow Lab Tools, (2) Google PageSpeed, and (3) WebPagetest.
Here's how my small personal site (https://www.tedmiston.com) performs on each. I use jQuery 2 and not Bootstrap but Pure, though I am currently migrating to Bootstrap 4.