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Qlik Sense Cookbook

You're reading from   Qlik Sense Cookbook Over 80 recipes on data analytics to solve business intelligence challenges

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Product type Paperback
Published in Aug 2018
Publisher Packt
ISBN-13 9781788997058
Length 334 pages
Edition 2nd Edition
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Authors (3):
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Philip Hand Philip Hand
Author Profile Icon Philip Hand
Philip Hand
Neeraj Kharpate Neeraj Kharpate
Author Profile Icon Neeraj Kharpate
Neeraj Kharpate
Pablo Labbe Pablo Labbe
Author Profile Icon Pablo Labbe
Pablo Labbe
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Toc

Table of Contents (11) Chapters Close

Preface 1. Getting Started with the Data FREE CHAPTER 2. Visualizations 3. Scripting 4. Managing Apps and the User Interface 5. Useful Functions 6. Set Analysis 7. Using Extensions in Qlik Sense 8. Advanced Aggregation with AGGR 9. Tips and Tricks 10. Other Books You May Enjoy

Optimizing the reload time of the application

There are two methods of loading data from QVDs: optimized and non-optimized. The key point here is that the optimized loads can be up to 100 times quicker than the non-optimized loads.

This speed increase is a result of the data passing directly from the disk (QVD) into the memory (RAM) without being unpacked from its compressed QVD format.

As you may have guessed, the reason every load is not optimized is that we often want to change the data coming out of the QVD. This requires it to be uncompressed before going into memory; hence, it is significantly slower. Just about any change to the data will cause the load to be non-optimized; however, there are a few things that we can do.

Getting ready

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