Book Image

Haskell High Performance Programming

By : Samuli Thomasson
Book Image

Haskell High Performance Programming

By: Samuli Thomasson

Overview of this book

Haskell, with its power to optimize the code and its high performance, is a natural candidate for high performance programming. It is especially well suited to stacking abstractions high with a relatively low performance cost. This book addresses the challenges of writing efficient code with lazy evaluation and techniques often used to optimize the performance of Haskell programs. We open with an in-depth look at the evaluation of Haskell expressions and discuss optimization and benchmarking. You will learn to use parallelism and we'll explore the concept of streaming. We’ll demonstrate the benefits of running multithreaded and concurrent applications. Next we’ll guide you through various profiling tools that will help you identify performance issues in your program. We’ll end our journey by looking at GPGPU, Cloud and Functional Reactive Programming in Haskell. At the very end there is a catalogue of robust library recommendations with code samples. By the end of the book, you will be able to boost the performance of any app and prepare it to stand up to real-world punishment.
Table of Contents (21 chapters)
Haskell High Performance Programming
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Networking and HTTP


The libraries in this subsection are as follows:

  • network (module Network) and network-uri: Low-level networking on bare sockets

  • connection: Easy-to-use abstraction on TCP connections. Supports TLS and HTTP or SOCKS proxies out of the box.

Basic low-level networking using the network package has been discussed in Chapter 6, I/O and Streaming.

For a bit higher-level TCP client communication, the connection package provides a nice little abstraction layer. Plus, connection supports SSL/TLS and SOCKS with minimal configuration. A connection is established primarily by defining a configuration value of type ConnectionParams, given by:

data ConnectionParams = ConnectionParams
  { connectionHostname  :: HostName
  , connectionPort      :: PortNumber
  , connectionUseSecure :: Maybe TLSSettings
  , connectionUseSocks  :: Maybe ProxySettings
  }

This is a simple yet effective API for all primitive TCP connections. The get and put operations use ByteString as data format. connection...