> For the complete documentation index, see [llms.txt](https://docs.wem.io/platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wem.io/platform/tutorials/video-tutorials.md).

# Video Tutorials

### Technology Behind Performance

Learn in this video about how to boost the performance of your wem applications. Gijs Reijner talks you through the technical aspects regarding performance. For a lot of cases this is because of filter expressions, and can be resolved with a more knowledge about how filter expressions work.  

{% embed url="<https://youtu.be/2bOg_H7V1yM>" %}

### Filter Queries and Batch Processing

In this video Ralph Coesmans talks about Filter queries and Batch Processing. Filter queries can often be a cause for an application to feel slow, and can be improved with the use of proper filter queries. When you need to update many rows in a list batch processing can be strategy to keep it fast and efficient.&#x20;

{% embed url="<https://youtu.be/jNGdlWceiGI>" %}

### The Double Loop

Douwe Roelofsen talks you trough why and how the double loop can make your application faster. Replacing the Go To Row with a double loop  limits the amount of queries your application has to perform. He also talks about Identifying the cause of a possible slowdown, and highlights the usual suspects that slow a application down.&#x20;

{% embed url="<https://youtu.be/uenzLcBeZ2g>" %}


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