# 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="" %} ### 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. {% embed url="" %} ### 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. {% embed url="" %}