Visualization used to show resource usage over time by different entities or jobs allows a user to see the resource usage of entities over time. Entities or jobs may be shown as horizontal bundles, possibly expanding or contracting within the constraints of the capacity of the system. Bundles can expand or contract but maintain continuity in a direction, for example, a horizontal continuity. The visualization or layout in one embodiment is updated not only for new incoming events, but also retroactively for past events, thus achieving smooth horizontal bundles as much as possible.