This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
When I sign in to gmail service with correct username and password the response of gmail is very fast.There are billions of users in gmail.
I want to know that how fast they manage authentication process on gmail service? What is the reason behind it? What application they used?