Download Clojure High Performance Programming (2nd Edition) by Shantanu Kumar PDF

By Shantanu Kumar

Become knowledgeable at writing quickly and excessive performant code in Clojure 1.7.0

About This Book
• improve code functionality by utilizing acceptable Clojure features
• increase the potency of purposes and plan their deployment
• A hands-on advisor to designing Clojure courses to get the easiest performance

Who This ebook Is For
This publication is meant for intermediate Clojure builders who're trying to get a very good grip on attaining optimal functionality. Having a simple wisdom of Java will be helpful.

What you'll Learn
• establish functionality concerns in Clojure courses utilizing diverse profiling tools
• grasp strategies to accomplish numerical functionality in Clojure
• Use Criterium library to degree latency of Clojure expressions
• make the most Java good points in Clojure code to augment performance
• keep away from mirrored image and boxing with variety hints
• comprehend Clojure's concurrency and state-management primitives in depth
• degree and display screen functionality, and comprehend optimization techniques

In Detail
Clojure treats code as information and has a macro method. It specializes in programming with immutable values and specific progression-of-time constructs, that are meant to facilitate the improvement of extra powerful courses, rather multithreaded ones. it really is equipped with functionality, pragmatism, and straightforwardness in brain. Like such a lot basic goal languages, quite a few Clojure positive factors have assorted functionality features that one may still comprehend for you to write excessive functionality code.

This ebook indicates you ways to judge the functionality implications of varied Clojure abstractions, become aware of their underpinnings, and follow definitely the right technique for maximum functionality in real-world programs.

It starts off through supporting you classify a number of use situations and the necessity for them with recognize to functionality and research of varied functionality facets. additionally, you will research the functionality vocabulary that specialists use through the international and realize numerous Clojure facts constructions, abstractions, and their functionality features. extra, the publication will advisor you thru bettering functionality through the use of Java interoperability and JVM-specific gains from Clojure. It additionally highlights the significance of utilizing the appropriate concurrent info constitution and Java concurrency abstractions.

This publication additionally sheds mild on functionality metrics for measuring, tips on how to degree, and the way to imagine and display screen the amassed facts. on the finish of the ebook, you'll discover ways to run a functionality profiler, determine bottlenecks, song functionality, and refactor code to get a greater performance.

Style and approach
An easy-to-follow consultant jam-packed with real-world examples and self-sufficient code snippets to help you get your arms soiled with excessive functionality programming with Clojure.

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Additional info for Clojure High Performance Programming (2nd Edition)

Sample text

The image in Computer Vision is a representation of the physical world captured with a digital device. This picture is only a sequence of numbers stored in a matrix format, as shown in the following image. Each number is a measurement of the light intensity for the considered wavelength (for example, red, green, or blue in color images) or for a wavelength range (for panchromatic devices). Each point in an image is called a pixel (for a picture element), and each pixel can store one or more values depending on whether it is a gray, black, or white image (called a binary image as well) that stores only one value, such as 0 or 1, a gray-scale-level image that can store only one value, or a color image that can store three values.

Cpp ) # create our new utils lib add_library(Utils ${UTILS_LIB_SRC} ) # make sure the compiler can find include files for our library target_include_directories(Utils PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}) This CMake script file defines an UTILS_LIB_SRC variable where we add all the source files included in our library, generate the library with the add_library function, and use the target_include_directories function to allow our main project to detect all header files. Leaving out the utils subfolder and continuing with the root cmake script, the Option function creates a new variable—in our case, WITH_LOG, with a small description attached.

Zip. Unzip the contents into a folder of your choice. 0 also has a new package called opencv_contrib that contains user contributions that are not yet considered stable. One thing to keep in mind is that some of the algorithms in the opencv_ contrib package are not freely available for commercial use. Also, installing this package is optional. OpenCV will work just fine if you don't install opencv_contrib. Since we are installing OpenCV anyway, it's good to install this package so that you can experiment with it later on (as opposed to going through the whole installation process again).

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