Comment by nightcraft

Thanks! The C++ bit comes in for the IPC (inter-process communication) between the IDE and Python.

There are a few different ways for the Python process to communicate (send data over for visualization, receive/transmit commands, etc) with the IDE. For instance, you could communicate over HTTP. Depending on the use case, that can have an appreciable performance overhead. Instead, Scripton uses a lower-level mechanism with a protocol optimized for sending binary payloads (eg: large numpy arrays, images, etc). This communication and processing is implemented in C++ as a native multithreaded node module. It effectively enables very low latency and high throughput visualizations.