Feature request from Corefix, posted on GitHub Aug 05, 2016
A problem will occur when you are adding any success message and the quickly changing page, fx adding a product to cart and then going to another page before the 3 seconds pass. This is especially true when dealing with production mode sites with all cache enable.
I'm not a Javascript wizard so not sure any time is needed at all. But it should definitely be decreased. If their have been any thoughts on why this is 3 seconds I would love to know it.