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  • Book Overview & Buying Clojure High Performance Programming, Second Edition
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Clojure High Performance Programming, Second Edition

Clojure High Performance Programming, Second Edition - Second Edition

By : Kumar
4.4 (5)
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Clojure High Performance Programming, Second Edition

Clojure High Performance Programming, Second Edition

4.4 (5)
By: Kumar
Buy this Book

Overview of this book

Clojure treats code as data and has a macro system. It focuses on programming with immutable values and explicit progression-of-time constructs, which are intended to facilitate the development of more robust programs, particularly multithreaded ones. It is built with performance, pragmatism, and simplicity in mind. Like most general purpose languages, various Clojure features have different performance characteristics that one should know in order to write high performance code. This book shows you how to evaluate the performance implications of various Clojure abstractions, discover their underpinnings, and apply the right approach for optimum performance in real-world programs. It starts by helping you classify various use cases and the need for them with respect to performance and analysis of various performance aspects. You will also learn the performance vocabulary that experts use throughout the world and discover various Clojure data structures, abstractions, and their performance characteristics. Further, the book will guide you through enhancing performance by using Java interoperability and JVM-specific features from Clojure. It also highlights the importance of using the right concurrent data structure and Java concurrency abstractions. This book also sheds light on performance metrics for measuring, how to measure, and how to visualize and monitor the collected data. At the end of the book, you will learn to run a performance profiler, identify bottlenecks, tune performance, and refactor code to get a better performance.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Performance by Design
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1. Performance by Design
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Use case classification
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A structured approach to the performance
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The performance vocabulary
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The latency numbers that every programmer should know
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Summary
2
2. Clojure Abstractions
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2. Clojure Abstractions
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Non-numeric scalars and interning
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Identity, value, and epochal time model
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Persistent data structures
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Sequences and laziness
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Transducers
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Transients
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Performance miscellanea
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Summary
3
3. Leaning on Java
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3. Leaning on Java
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Inspecting the equivalent Java source for Clojure code
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Numerics, boxing, and primitives
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Arrays
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Reflection and type hints
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Using array/numeric libraries for efficiency
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Resorting to Java and native code
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Summary
4
4. Host Performance
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4. Host Performance
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The hardware
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The Java Virtual Machine
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Measuring latency with Criterium
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Summary
5
5. Concurrency
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5. Concurrency
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Low-level concurrency
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Atomic updates and state
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Asynchronous agents and state
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Coordinated transactional ref and state
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Dynamic var binding and state
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Validating and watching the reference types
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Java concurrent data structures
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Concurrency with threads
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Clojure parallelization and the JVM
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Parallelism with reducers
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Summary
6
6. Measuring Performance
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6. Measuring Performance
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Performance measurement and statistics
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Performance testing
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Performance monitoring
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Profiling
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Summary
7
7. Performance Optimization
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7. Performance Optimization
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Project setup
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Identifying performance bottlenecks
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Profiling code with VisualVM
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The Monitor tab
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Performance tuning
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Summary
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8. Application Performance
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8. Application Performance
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Choosing libraries
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Logging
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Data sizing
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Resource pooling
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I/O batching and throttling
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Precomputing and caching
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Concurrent pipelines
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Applying back pressure
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Performance and queueing theory
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Summary
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Index
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Index

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