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Haskell High Performance Programming

Haskell High Performance Programming

By : Thomasson
3 (2)
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Haskell High Performance Programming

Haskell High Performance Programming

3 (2)
By: 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 (16 chapters)
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15
Index

Chapter 6. I/O and Streaming

I/O in Haskell is a source of confusion for many. The I/O functions in the base library are lazy and allow the interleaving of I/O side effects with pure code. This produces weird errors at runtime or, even worse, just incorrect behavior without errors. On the other hand, interleaved side-effects allow easy file processing in constant space, among other things. Fortunately, more robust alternatives for streaming have been proposed and implemented as libraries.

In this chapter, we will learn to use some of the most popular streaming libraries. But before that, we will tear down problems with lazy I/O, because it's still often the easiest and most elegant way to do I/O. We will also consider an alternative to lazy I/O, strict I/O.

The I/O we do in this chapter consists of standard input and output, file handles, and network sockets. These cover almost all I/O that's possible in Haskell (we don't do foreign interfaces in this chapter). Resource...

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