Linked by Thom Holwerda on Sat 4th Aug 2012 00:54 UTC
Google This tweet from Tom Warren made me smile. So, it's 2012 and tablets are finally able to do what the Amiga did in 1985. Seems like a bit of a stretch to be excited about that, right? Sure, until I caught myself getting excited - only a bit, but still - by this piece of news. Update: removed me being an annoyed child.
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by WereCatf on Sat 4th Aug 2012 21:17 UTC in reply to "RE[4]: KISS"
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And I fear that multi-user support will increase this slowness, actually... I'm pretty sure of that because I dealt with multiuser issues during my career.

Does your Windows, Mac or Linux device slow down as you add more and more user accounts on it?

I mean, the device will have to store the state of the session when you switch between users (running apps, configs, connections, ecc)... Android has to keep that state in memory somehow, in RAM or swap it to the flash memory... It's not a minor concern, It can be very resource hungry.

Of course the state would be saved in the permanent storage, there would be no benefit from keeping it in RAM at all times except when you switch users, and well, that's not something you do every few minutes. It doesn't consume resources after it's been saved to storage.

Then you have the file owner/permission issue. You don't want that your files can be modified by another user. Android will have to implement that too.

ext2/3/4 filesystem already handles that, Google only needs to check that Android itself uses those. It's not as large an issue as you seem to believe.

That's why I think adding multiuser support to a mobile OS is a big fat stupid idea. Good multiuser support is a complex thing. It's not trivial nor "free".

Proper multi-user support is mostly a kernel - and filesystem - thing, the layers on top of that are merely an extension of kernel and filesystem functionality.

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