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In the new Auth Dialog, extended permissions have this behaviour built in.

https://developers.facebook.com/docs/beta/authentication/

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This particular number counts monthly active users. Your friends with three accounts would have to be active on the site at least once a month in each account for them to be counted in this total.

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Yes, that's correct. I'm not referring to inactive or throwaway accounts. Many people I know have an account for a business, separate to their personal account, and some have multiple accounts to keep their work friends separate from personal lives, and they use each account frequently.

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Solving this problem in general is a major area of research. Look up "Partial Evaluation."

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Yes! I second this. Partial evaluation is especially compelling stuff for improving efficiency. I'm glad other people on HN are into it.

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I can't and won't say anything about Google, but I will say that your implication that we Facebook employees are greedy, un-hacker-like and unable to get into Google is inaccurate and unfair.

I can't argue on any objective basis on the financial motivation point. (How would I measure that? How did -you- measure that?) I will say that in my experience my coworkers are primarily motivated by the ability to have a outsized impact and the ability to work with great independence.

Facebook has a crazy-passionate hacker culture. Tons of engineers have really neat side projects, and plenty of these ship. Every six weeks or so we have (voluntary) all night hackathons, where there is plenty of food and drink, and the agreed task is simply to build something cool not related to our usual work.

Finally, P(Could work at Google | Works at Facebook) is really high. As evidenced by a recent news article, hundreds of Facebook people are actually Google alumni. I know many of my coworkers turned down Google offers to come here, and it's practically routine for new grad hires to have a Google offer as leverage in coming to FB.

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Hi ambition, I was painting with pretty broad strokes, and I did not intend to say Facebook employees are "greedy" (I do not believe I did say that). I meant that the value systems of the people I know in both places tend to be slightly different.

One way to quantify the difference between the two types of engineers (if there is such a difference, as I hypothesize), would be to measure the volume of their open-source work prior to joining the companies. Maybe just number of contributed-to projects X years before joining as a rough estimate? Actually, I'd be interested in seeing that data for employees across the board at the major SV tech companies.

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Check out U of T's Snowflock. Very fast VM cloning and destruction.

http://sysweb.cs.toronto.edu/snowflock

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Hundreds of milliseconds, wow. Thanks!

Ach, I see now what eru meant by copy-on-write VMs.

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Yes. Booting up every VM would take too long. Cloning them just before you execute the payload is the way to go.

(At least as long as you have a general purpose operating system. A special paravirtualised would probably not need to make much of a difference between booting and resuming. But that's only a theoretical musing for your circumstances.)

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Many thanks for the tip.

This is my new plan of last resort if I can't prevent the current sandbox from failing.

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Please keep me informed (matthias.goergens@gmail.com) on your progress, if you go this route. Thanks!

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Will do!

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The latest nightlies conform to the latest draft. And Safari 5 supports WebSockets.

But yes, it's an annoyingly volatile standard-in-progress.

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What language is this?

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It looks like C# 3+.

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Yes, this: http://msdn.microsoft.com/en-us/library/bb535184(v=VS.100).a...

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Did you report it to Facebook before publicizing it?

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If HN members have any questions or comments about the Automata article, I'd like to hear them.

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I enjoyed it. I would've liked to see pointers/comparisons to such libraries for other languages -- that is, ones that export usable regex/finite automaton abstractions, not just the usual Perl stuff.

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I'm going to work at Facebook soon, and I'm paying very close attention to what's going on. I'm looking forward to seeing the other side of the story as it were.

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