Wrapping Up

In this chapter, you learned to appreciate the power of macros, but also to be cautious in applying them. You saw how easy it is to bind to C programs from Crystal. We dug deeper into how Crystal executes as a cooperative factory of fibers. Using concurrency when appropriate can improve your performance for many kinds of projects. Last, you saw how you can easily integrate your app with a wide range of databases.

In the next (and final) chapter, you’ll see what Crystal has to offer in the realm of web frameworks. We’ll conclude with a discussion of the most important shards in various application areas.