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>

Related Content you might be interested in

Current Title:

Small book image
Clojure High Performance Programming
Shantanu Kumar
Nov, 2013 | 152 pages
No titles found
Table of Contents (15 chapters)
Clojure High Performance Programming
Clojure High Performance Programming
Credits
Credits
About the Author
About the Author
Acknowledgments
Acknowledgments
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Performance by Design
Performance by Design
Use case classification
Performance vocabulary
Latency numbers every programmer should know
Summary
2
Clojure Abstractions
Clojure Abstractions
Non-numeric scalars and interning
Identity, value, and epochal time model
Persistent data structures
Sequences and laziness
Transients
Performance miscellanea
Summary
3
Leaning on Java
Leaning on Java
Inspect the equivalent Java source for Clojure code
Numerics, boxing, and primitives
Arrays
Reflection and type hints
Using array/numeric libraries for efficiency
Resorting to Java and native code
Summary
4
Host Performance
Host Performance
The hardware
The Java Virtual Machine
Measuring latency with Criterium
Summary
5
Concurrency
Concurrency
Low-level concurrency
Atomic updates and state
Asynchronous agents and state
Coordinated transactional ref and state
Dynamic var binding and state
Validating and watching the reference types
Java concurrent data structures
Concurrency with threads

Clojure parallelization and the JVM
Parallelism with reducers
Summary
6
Optimizing Performance
Optimizing Performance
A tiny statistics terminology primer
Performance testing
Performance monitoring
Profiling
Performance tuning
Summary
7
Application Performance
Application Performance
Data sizing
Resource pooling
I/O batching and throttling
Precomputing and caching
Concurrent pipelines
Applying back pressure
Performance and queuing theory
Summary
Index
Index

About the Reviewers

Jan Borgelin is the co-founder and CTO of BA Group Ltd., a Finnish IT consultancy providing services for global enterprise clients. With over 10 years of professional software development experience, Jan has had the chance to work with different technologies and programming languages in international projects where performance requirements have always been critical to the success of the project.

Mimmo Cosenza aka Magomimmo is a programmer and entrepreneur living in Milan, Italy. In the eighties, after graduating in Philosophy of Language, he worked for Rank Xerox and IBM. Then, he joined the Artificial Intelligence lab of ENI S.p.A, the Italian national oil company.

He designed and developed very successful LISP-based applications for the exploration and production departments of ENI. In 1995, after having been in Los Angeles during the rise of the Internet, he founded Sinapsi—an Italian software boutique. In his own country, he is very well known for his involvement in open source communities. In 2012, he founded SmartRM Inc., a startup that applies the Digital Right Management technology for protecting privacy to share confidential information without losing the control of their circulation.

He loves to teach the art of programming. He is the author of Modern-cljs, an open source book on the Clojure and ClojureScript programming languages. The book is hosted on https://github.com/magomimmo/modern-cljs.

Currently, he is applying machine learning techniques to Big Data by using Clojure on the server-side and ClojureScript on the client-side.

Paul Stadig is a professional software developer living in Crozet, VA, with his wife and three children. He has a B.S. and an M.S. in Computer Science from George Mason University, and he has 16 years of software development experience. He has an insatiable curiosity about the world in general and about programming languages in particular.

He has been involved in the Clojure community since 2008, he was a reveiwer for the first edition of Programming Clojure, and he is also a contributor to the language. Since 2010, he has been employed at Sonian, where he builds cloud-based distributed systems in Clojure.

Miki Tebeka has been shipping software for more than 10 years. He has developed a wide variety of products from assemblers and linkers to news trading systems and cloud infrastructures. Miki currently works on the data pipeline at Demand Media. In his free time, Miki is active in several open source communities.

Previous Section
Next Chapter