Multiverse Notebook: A Notebook Environment for Safe and Efficient Exploration

Notebook environments are used widely in data analysis and machine learning because their interactive user interfaces fit well with exploratory tasks in these areas. However, the execution model of existing notebook environments is unsuitable for safe and efficient exploration because every code cell of a notebook runs in a single execution environment even for independent exploratory tasks, where unintended interference can arise among them. To resolve this problem, we developed Multiverse Notebook, a notebook environment that runs each cell in a separate execution environment and saves its execution state. In this poster, we present Multiverse Notebook and our techniques to reduce the application's time and space of Multiverse Notebook.