They still could be caching them. The first time they encounter a factorial, they calculate it, throw it in a DB, and it's a quick DB access from then on.
It looks great, but its error handling could be improved. When I forgot to copy a bracket, it emptied the text box and gave me a generic error message. It would be helpful if it could at least give a line number for the error, and refill the text box. Also, putting "jsonifier" or something in front of the title would be great. When I have 15-20 tabs open, I only see 5-6 characters of the title, and "auto-f" doesn't allow for me to easily switch to something.
Other than that, it looks like a useful service, and well done.
I'm a teenager in a public high school, and I have not seen a single person use Google+. This is not because Google+ is age limited, or because Google+ is inferior, but because nobody uses Google+. Already, most people I know (including non "techies"), use Facebook primarily for chat. The rest of the Facebook features are just "extra", and used occasionally. Unless Google can pull something revolutionary out of their hat (or Facebook has a major blunder) in regards to chat, they aren't going to be able to pull the teenage community over.
Note that this is from my personal experiences, and has a high probability of being completely wrong when you look at a broader population.
Now that seems weird. Thanks for sharing, but, really:
Unless Google can pull something revolutionary out of their
hat (or Facebook has a major blunder) in regards to chat
Don't you know about GTalk? Or what would you add to it, to get to FB chat level? Because it's basically the ~same thing~, based on the same technology (xmpp).
I don't know if others feel this way, but I don't find Google's UI outside of search very appealing. And that includes Gmail, which is where a good chunk of GTalk conversations happen. Couple that with email in general not being a pleasant experience for many, and you have a lot of people who don't want to hang out on GTalk. Also, keep in mind that chat was "magically" sprung upon Facebook users when it launched; they didn't have to sign up for yet another account and most of one's friends were already there. It was as simple as clicking on a person's name and typing.
Regarding GTalk / GMail: I just want to point out that GTalk features a decent mobile client (at least for Android, WebOS - no idea about the rest), a desktop client (at least for Windows?) and a widget that you can use not only in GMail (think google.com/ig for example). Or - connect with a decent 3rd party IM app on just about every OS.
Which are all fine if you're using GTalk. However, if all your friends use FB chat, you're probably not going to switch.
Back when I was in middle/high school, people I knew used AIM, not Yahoo Messenger, or MSN Messenger because that's where their friends were. The fact that they were essentially the same just served to enforce the point that AIM would have had to make a very major blunder for anyone to switch. The same holds for facebook chat.
I know about GTalk, and have used it in the past, but nobody uses it, possibly because nobody knows about it. The extent of most people's interactions with GMail are the Inbox and the Send Message workflow. Few people bother setting up contacts in GMail (it's all in their phones), and even fewer will actually click on a contact to be able to see the "Invite To Chat" button.
