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Hands-On JavaScript High Performance

You're reading from   Hands-On JavaScript High Performance Build faster web apps using Node.js, Svelte.js, and WebAssembly

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Product type Paperback
Published in Feb 2020
Publisher Packt
ISBN-13 9781838821098
Length 376 pages
Edition 1st Edition
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Author (1):
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Justin Scherer Justin Scherer
Author Profile Icon Justin Scherer
Justin Scherer
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Table of Contents (15) Chapters Close

Preface 1. Tools for High Performance on the Web 2. Immutability versus Mutability - The Balance between Safety and Speed FREE CHAPTER 3. Vanilla Land - Looking at the Modern Web 4. Practical Example - A Look at Svelte and Being Vanilla 5. Switching Contexts - No DOM, Different Vanilla 6. Message Passing - Learning about the Different Types 7. Streams - Understanding Streams and Non-Blocking I/O 8. Data Formats - Looking at Different Data Types Other Than JSON 9. Practical Example - Building a Static Server 10. Workers - Learning about Dedicated and Shared Workers 11. Service Workers - Caching and Making Things Faster 12. Building and Deploying a Full Web Application 13. WebAssembly - A Brief Look into Native Code on the Web 14. Other Books You May Enjoy

Chrome – an in-depth look at the Memory tab

As we move from the performance section to the memory section, we will revisit a good number of concepts from the performance tool. The V8 engine provides a great amount of support for developing applications that are both efficient in terms of CPU usage and also memory usage. A great way to test your memory usage and where it is being allocated is the memory profiling tool.

With the latest version of Chrome at the time of writing, the memory profiler appears as follows:

We will mainly be focusing on the first option that is selected, the Heap snapshot tool. The Allocation instrumentation on timeline tool is a great way to visualize and playback how the heap was being allocated and which objects were causing the allocations to occur. Finally, the Allocation sampling tool takes periodic snapshots instead of providing a continuous...

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