What do you get with Print?

Instant access to your digital eBook copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Download this book in EPUB and PDF formats

Access this title in our online reader with advanced features

DRM FREE - Read whenever, wherever and however you want

Description

Simply knowing how to code is not enough; on mission-critical pieces of code, every bit of memory and every CPU cycle counts, and knowing how to squish every bit of processing power out of your code is a crucial and sought-after skill. Nowadays, Python is used for many scientific projects, and sometimes the calculations done in those projects require some serious fine-tuning. Profilers are tools designed to help you measure the performance of your code and help you during the optimization process, so knowing how to use them and read their output is very handy. This book starts from the basics and progressively moves on to more advanced topics. You’ll learn everything from profiling all the way up to writing a real-life application and applying a full set of tools designed to improve it in different ways. In the middle, you’ll stop to learn about the major profilers used in Python and about some graphic tools to help you make sense of their output. You’ll then move from generic optimization techniques onto Python-specific ones, going over the main constructs of the language that will help you improve your speed without much of a change. Finally, the book covers some number-crunching-specific libraries and how to use them properly to get the best speed out of them. After reading this book, you will know how to take any Python code, profile it, find out where the bottlenecks are, and apply different techniques to remove them.

What you will learn

Master code optimization stepbystep and learn how to use different tools

Understand what a profiler is and how to read its output

Interpret visual output from profiling tools and improve the performance of your script

Use Cython to create fast applications using Python and C

Take advantage of PyPy to improve performance of Python code

Optimize numbercrunching code with NumPy, Numba, Parakeet, and Pandas

What do you get with Print?

Instant access to your digital eBook copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Download this book in EPUB and PDF formats

Access this title in our online reader with advanced features

DRM FREE - Read whenever, wherever and however you want

Frequently bought together

€36.99

Python 3 Object-Oriented Programming - Second Edition

€41.99

€36.99

Total € 115.97

FAQs

What is the delivery time and cost of print book?

Shipping Details

USA:

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.

Unfortunately, due to several restrictions, we are unable to ship to the following countries:

Afghanistan
American Samoa
Belarus
Brunei Darussalam
Central African Republic
The Democratic Republic of Congo
Eritrea
Guinea-bissau
Iran
Lebanon
Libiya Arab Jamahriya
Somalia
Sudan
Russian Federation
Syrian Arab Republic
Ukraine
Venezuela

What is custom duty/charge?

Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

Do I have to pay customs charges for the print book order?

The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

How do I know my custom duty charges?

The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.

How can I cancel my order?

Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy?

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged?

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use?

You can pay with the following card types:

Visa Debit
Visa Credit
MasterCard
PayPal

What is the delivery time and cost of print books?

Shipping Details

USA:

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Unfortunately, due to several restrictions, we are unable to ship to the following countries:

Afghanistan
American Samoa
Belarus
Brunei Darussalam
Central African Republic
The Democratic Republic of Congo
Eritrea
Guinea-bissau
Iran
Lebanon
Libiya Arab Jamahriya
Somalia
Sudan
Russian Federation
Syrian Arab Republic
Ukraine
Venezuela

Its Me Hara Jun 09, 2018

Good item. Good book for Python developer

Amazon Verified review

Duncan W. Robinson Oct 16, 2015

Though I’ve programmed in R for some time, I am relatively new to Python. “Mastering Python High Performance” helped me with some Python syntax issues. I found Chapter 4 “Optimize Everything”, which includes coverage on dictionary lookups, list comprehensions & miscellaneous tips / tricks, the most useful. Chapter 5 was also interesting as it helped me understand the pros & cons of multithreading versus multiprocessing. Overall, I found this a helpful & informative text for a Python programmer with some prior experience in the language.

Mike Driscoll Oct 15, 2015

When I was originally reading this book, I was interested in seeing how the author would speed up their code. He covers a wide variety of topics which is good, but that also hampers the book as none of the topics are covered in depth. He uses lots of small examples and shows how to profile before moving on to optimizing them. Let’s go over each of the chapters so you can get a taste of what the book covers. Full disclosure: I was a technical reviewer of the book for Packt.Chapter one is all about profiling your code. It covers the differences between statistical and event-based profiling, what profiling is and why it’s important, bottlenecks and memory leaks. It also goes over running time complexity (linear, factorial, quadratic, etc) and profiling best practices.Then we logically move into chapter two where we learn about some profilers we can use with Python. The two that are covered are cProfile (included with Python) and line_profiler. The author demonstrates various ways to use cProfile to measure your code and also how to use Python’s pstats module, which is used for analyzing the results you receive from cProfile. Then the author moves on to using line_profiler and kernprof to analyze the same (or similar) examples used with cProfile. I think this is one of the best balanced chapters in the book and really quite interesting all by itself.Chapter three goes into using visual tools to help you understand your profiler’s output. In this chapter, you will learn about KCacheGrind / pyprof2calltree and RunSnakeRun. For the most part, you’ll just learn how to use these tools to figure out what your data means.In chapter four, we learn about optimizing your code. Topics covered are memoization, list comprehensions, generators, ctypes, loading your own custom C library, and some others tips and tricks. While this chapter is short, it has some good ideas and is worth reading or at least skimming.Chapter five digs into multithreading and multiprocessing. You’ll learn about the pros and cons of each. You will also learn about the Global Interpreter Lock and how that affects you when you choose one of these techniques.Chapter six goes into using PyPy and Cython and how they can be useful for additional optimizations to your code. I enjoyed this chapter, although I didn’t feel that PyPy got as much attention as Cython. There also weren’t very many coding examples.If you’re into number crunching, then chapter seven is for you. It goes over how to use Numba, Parakeet and pandas. Quite frankly, out of the three of libraries, I had only ever heard of pandas. I personally don’t need to do a lot of number crunching in my line of work, but it was interesting to see how each of the libraries worked and get a general idea of what they could be used for.Finally in chapter eight, the author attempts to put it all together. This chapter probably should have been twice as long as it is so that he could have actually covered everything. But in the end, it covers just barely enough and you do get to see a full example get optimized from beginning to end.Overall, I enjoyed this book. I would recommend this to anyone who needs ideas for optimizing their Python code or just for learning about profiling in general.

Adriano Ribeiro Jan 23, 2016

I think ththis book is a practical for impatients programmers. For me, the most interesting chapters were 4:Optimize Everything, 6:Generic Optimization Options and 7:Lightning Fast Number Crunching with Numba, Parakeet, and pandas. Very good start point.

Chris Dec 01, 2015

Mastering Python High Performance is a worthwhile buy for python programmers who are looking to take their skills to a new level. It gives you a pretty good explanation of how the code is executed when it is run which can be useful for anyone who wants to have more in depth knowledge of computing. If I had one gripe it would be it seems to rush into the topic a bit too quickly and jumps into algorithm and doesn’t sufficiently go over the topic. Overall, “High Performance Python” is a vast topic and this book does a good enough job getting into the finer points of python coding.

Mastering Python High Performance: Learn how to optimize your code and Python performance with this vital guide to Python performance profiling and benchmarking

What do you get with Print?