Wave Defense was added as a speedrun category a week ago.
You find the leaderboard here: https://www.speedrun.com/factorio#_Category_Extensions

Hello, this happens to me exclusively when I start dragging on an already placed entity. The gap will always be between the placed entity and the next one I intend to place. When I start dragging on an empty tile there is no limit on how fast I can drag, there will never be a gap. Log file attached....

When placing entities e.g. furnaces in a line I often end up with some gapes in the line. This seems to happen for all entities larger than 1*1 tile. All the small entites such as belts and pipes behave like I would expect. They can be dragged without any gapes. See attachment for reference: https:/...