Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying R High Performance Programming
  • Table Of Contents Toc
  • Feedback & Rating feedback
R High Performance Programming

R High Performance Programming

By : Aloysius Shao Qin Lim, Tjhi W Chandra
4.4 (14)
close
close
R High Performance Programming

R High Performance Programming

4.4 (14)
By: Aloysius Shao Qin Lim, Tjhi W Chandra

Overview of this book

This book is for programmers and developers who want to improve the performance of their R programs by making them run faster with large data sets or who are trying to solve a pesky performance problem.
Table of Contents (12 chapters)
close
close
11
Index

Summary

In this chapter, we learned about two classes of parallelism: data parallelism and task parallelism. Data parallelism is good for tasks that can be performed in parallel on partitions of a dataset. The dataset to be processed is split into partitions and each partition is processed on a different worker processes. Task parallelism, on the other hand, divides a set of similar or different tasks to amongst the worker processes. In either case, Amdahl's law states that the maximum improvement in speed that can be achieved by parallelizing code is limited by the proportion of that code that can be parallelized.

R supports both types of parallelism using the parallel package. We learned how to implement both data parallel and task parallel algorithms using socket-based clusters and forked clusters. We also learned how to run tasks in parallel on a cluster of computers using socket-based clusters.

The examples in this chapter demonstrated that the improvement in performance by parallelizing...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech
bookmark search playlist font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY