at a stroke; in one go; all at once
Describes doing something completely or dealing with many things in a single action, often with a sense of decisiveness or efficiency.
He solved the problem at a stroke.
The new president reformed the organization in one fell swoop.
The new system resolved several problems all at once.
The political situation changed dramatically all at once because of the election results.
Sales increased threefold all at once.
I cleared away all the piled-up work in one go.