Investors worried that Twitter isn’t growing its advertising revenues fast enough may want to take a chill pill.

While the social networking giant’s user growth is slowing, it said today its ad sales for the fourth quarter were $432 million, up 97 percent year over year.

Twitter also said it had total revenues of $479 million for Q4.

In its Q4 earnings release, which the company put out just minutes ago, Twitter said its global ad revenues for the quarter came in at $2.37 per 1,000 timeline views, its standard engagement metric. That was up 60 percent from a year earlier. For the quarter, mobile ad sales accounted for 88 percent of the total, up from 85 percent in the third quarter.

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