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Mastering  Node.js

You're reading from   Mastering Node.js Build robust and scalable real-time server-side web applications efficiently

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781785888960
Length 498 pages
Edition 2nd Edition
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Authors (2):
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Sandro Pasquali Sandro Pasquali
Author Profile Icon Sandro Pasquali
Sandro Pasquali
Kevin Faaborg Kevin Faaborg
Author Profile Icon Kevin Faaborg
Kevin Faaborg
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Table of Contents (13) Chapters Close

Preface 1. Understanding the Node Environment FREE CHAPTER 2. Understanding Asynchronous Event-Driven Programming 3. Streaming Data Across Nodes and Clients 4. Using Node to Access the Filesystem 5. Managing Many Simultaneous Client Connections 6. Creating Real-Time Applications 7. Using Multiple Processes 8. Scaling Your Application 9. Microservices 10. Testing Your Application 11. Organizing Your Work into Modules 12. Creating Your Own C++ Add-ons

Testing the terrain

Testing Node can also require a more scientific, experimental effort. For example, memory leaks are notoriously difficult bugs to track down. You will need powerful process profiling tools to take samples, test scenarios, and get a grip on just where the problem is coming from. If you are designing a log analysis and summarization tool that must crunch through gigabytes of data, you might want to test out various parsing algorithms and rank their CPU/memory usage. Whether testing the existing processes or being a software engineer, gathering information on resource usage is important. What we will look at in this section is how to take data snapshots of running processes, and how to draw useful information out of them.

Node already provides some process information natively. Basic tracking of how much memory your Node process is using is easy to fetch with...

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