You're reading from Clojure High Performance Programming Become an expert at writing fast and high performant code in Clojure 1.7.0

Product type Paperback

Published in Sep 2015

Publisher

ISBN-13 9781785283642

Length 198 pages

Edition 2nd Edition

Languages

Clojure

Concepts

High Performance Programming

Author (1):

Shantanu Kumar

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Table of Contents (10) Chapters

Preface

1. Performance by Design FREE CHAPTER

2. Clojure Abstractions

3. Leaning on Java

4. Host Performance

5. Concurrency

6. Measuring Performance

7. Performance Optimization

8. Application Performance

Index

Chapter 4. Host Performance

In the previous chapters, we noted how Clojure interoperates with Java. In this chapter we will go a bit deeper to understand the internals better. We will touch upon several layers of the entire stack, but our major focus will be the JVM, in particular the Oracle HotSpot JVM, though there are several JVM vendors to choose from (http://en.wikipedia.org/wiki/List_of_Java_virtual_machines). At the time of writing this, Oracle JDK 1.8 is the latest stable release and early OpenJDK 1.9 builds are available. In this chapter we will discuss:

How the hardware subsystems function from the performance viewpoint
Organization of the JVM internals and how that is related to performance
How to measure the amount of space occupied by various objects in the heap
Profile Clojure code for latency using Criterium

The rest of the chapter is locked

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Authors (1)

Shantanu Kumar

Shantanu Kumar is a software developer living in Bengaluru, India. He works with Concur Technologies as a principal engineer, building a next-generation stack in Clojure. He started learning computer programming when he was at school, and has dabbled in several programming languages and software technologies. Having used Java for a long time, he discovered Clojure in early 2009 and has been a fan of it ever since. When not busy with programming or reading up on technical stuff, he enjoys reading non-fiction and cycling around Bengaluru. Shantanu is an active participant in The Bangalore Clojure Users Group, and contributes to several open source Clojure projects on GitHub. He is also the author of the first edition of the book Clojure High Performance Programming, Packt Publishing.

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