User blog comment:TheGoldenPatrik1/An Introduction to Dev/@comment-27345308-20180206091533

"Before you go and import everything on Dev, a quick word of caution. Importing large amounts of JavaScript will slow down load times."

That really differs from what you're importing. Importing 50 scripts through one importArticles statement will make only one HTTP request instead of 50 but the scripts you're importing may be making further HTTP requests that can slow down things (not necessarily load times, because the requests are done asynchronously).

We also have a big list of most available enhancements on Dev Wiki!