Meaning of 早速 in Japanese

When I reached the hall right away the person in charge unrelentingly said things like "This painting is certain to increase in value in the future," and I went and signed the contract.

She lost no time in reading a best-selling novel.

Ms Mizuta likes that "Buska" character so much, last time she happened by a store that had Buska goods, she homed in on them and bought one on the spot.

The media got wind of a rumor about his engagement and came quickly.