Book Image

Clojure High Performance Programming

By : Shantanu Kumar
Book Image

Clojure High Performance Programming

By: Shantanu Kumar

Overview of this book

<p>Clojure is a young, dynamic, functional programming language that runs on the Java Virtual Machine. It is built with performance, pragmatism, and simplicity in mind. Like most general purpose languages, Clojure’s features have different performance characteristics that one should know in order to write high performance code.<br /><br />Clojure High Performance Programming is a practical, to-the-point guide that shows you how to evaluate the performance implications of different Clojure abstractions, learn about their underpinnings, and apply the right approach for optimum performance in real-world programs.<br /><br />This book discusses the Clojure language in the light of performance factors that you can exploit in your own code.</p> <p>You will also learn about hardware and JVM internals that also impact Clojure’s performance. Key features include performance vocabulary, performance analysis, optimization techniques, and how to apply these to your programs. You will also find detailed information on Clojure's concurrency, state-management, and parallelization primitives.</p> <p>This book is your key to writing high performance Clojure code using the right abstraction, in the right place, using the right technique.</p>
Table of Contents (15 chapters)
Clojure High Performance Programming
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Index

Chapter 3. Leaning on Java

Being hosted on the Java Virtual Machine (JVM), there are several aspects of Clojure in which it really helps to know about the Java language and platform. The need is not only due to interoperability with Java or understanding its implementation, but also for performance reasons. In certain cases, Clojure may not generate optimized JVM bytecode by default; in some other cases, you may want to go beyond the performance Clojure data structures offer — you can use the Java alternatives via Clojure to get better performance. This chapter discusses those aspects of Clojure. In this chapter, we will discuss:

  • Inspecting Java generated from Clojure source

  • Numerics and primitives

  • Working with arrays

  • Reflection and type hinting