Their website tells within 3 days you'll get an answer, some people say they get it the same day, but i've heard others said 3 weeks.
Ultimately it depends on your local embassy, they process your request. For me it was in mexico and it seemed like they forgot my file because after a week i was still without answers and I had only 2 buisness days left before my flight. So i wrote an email to the embassy and one hour later I was approved.
It should take 3 days maximum but if it takes more time write to your embassy to make sure your file hasnt been forgotten.