Modern network security and monitoring applications need to analyse traffic efficiently in streaming fashion (i.e. while traffic is flowing). This is in order to detect interesting traffic patterns in realtime without dumping data on a database and performing computationally expensive queries in batches. Many network developers do not have skills for efficiently analyse traffic, and data scientists often do not have skills to understand the complex nature of network traffic. For this reason nDPI, a popular open-source deep packet inspection library, has been enhanced with various algorithms and techniques that dramatically simplify traffic analysis and that should ease the creation of applications able to efficiently spot traffic patterns and anomalies. This talk will introduce some of these algorithms present in nDPI and show how they can be used in real-life at high-speed, contrary to many applications that are inefficient and often based on languages (e.g. Python and R) that are not designed to analyse traffic in streaming at 10 Gbit+ on commodity hardware.