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From: Jaimie Vandenbergh on 5 Apr 2010 18:05
On Mon, 05 Apr 2010 23:43:16 +0200, Jochem Huhmann <joh(a)gmx.net>
wrote:

>Jaimie Vandenbergh <jaimie(a)sometimes.sessile.org> writes:
>
>> On Mon, 05 Apr 2010 21:29:50 +0200, Jochem Huhmann <joh(a)gmx.net>
>> wrote:
>>
>>>Ian McCall <ian(a)eruvia.org> writes:
>>>
>>>> Must admit I'm more interested in this than I am the current iPad mania.
>>>> Please, -please- let the multitasking rumours be true.
>>>> <http://www.macrumors.com/2010/04/05/iphone-os-4-0-preview-event-scheduled-for-this-thursday/>
>>>
>>>The problem is that the iPad has just 256MB of RAM. This will mean some
>>>tight limits for multitasking and with no virtual memory the thing will
>>>run out of RAM very soon.
>>
>> iPhoneOS supports VM (unsurprisingly, since it's Darwin under the
>> hood) but doesn't have any enabled under normal circumstances. I read
>> some tales of enabling it on't Web somewhere, but can't find it now.
>
>Even with VM (which I suspect *will* have to be enabled to avoid
>surprises that are more harmful than the thing slowing down)
>multitasking will at least force you to handhold the system (quitting
>apps in the background you aren't needing anymore, decide if you want to
>really quit or just background the app you're leaving and so on). I just
>hope Apple will make that straight and easy.

Yup. I'm (jailbroken) using Kirikae for my task switcher, and that has
a tidy enough interface - but getting to it relies on some
shenanigans. I use hold-home-button, which is already overloaded with
the voice control app, but there are many other possibilities - none
of them ideal.

Cheers - Jaimie
--
"People don't buy Microsoft for quality, they buy it for compatibility
with what Bob in accounting bought last year. Trace it back - they buy
Microsoft because the IBM Selectric didn't suck much" - P Seebach, afc
From: Chris Ridd on 6 Apr 2010 02:02
On 2010-04-05 21:59:15 +0100, SteveH said:

> Jonathan White <jonbwfc(a)hotmail.com> wrote:
>
>>> problem is that the iPad has just 256MB of RAM. This will mean some
>>> tight limits for multitasking and with no virtual memory the thing will
>>> run out of RAM very soon.
>> I read in one of the various 'taking the ipad apart to see what's
>> inside' articles that the iPad in fact had 512MB of RAM. Still not a
>> massive amount, but I'd imagine you won't be running FInal Cut Pro on
>> it so...
>
> To be fair, for 'everyday' use, there's absolutely no excuse for not
> being able to run on 256MB of RAM - we're just used to everything being
> bloated to the extreme.

ARM code is pretty compact. Quite a lot of apps on my iPod seem to be
1MB - 5MB in size, multiply by 40 if these were Mac apps!

> I swear this MacBook Air is no quicker at normal office / browsing type
> tasks than my Tonkabook.

Running the same versions of software?
--
Chris

From: Ric on 6 Apr 2010 04:52
On 5 Apr, 21:35, Jaimie Vandenbergh <jai...(a)sometimes.sessile.org>
wrote:
> On Mon, 05 Apr 2010 21:29:50 +0200, Jochem Huhmann <j...(a)gmx.net>
> wrote:
>
> >Ian McCall <i...(a)eruvia.org> writes:
>
> >> Must admit I'm more interested in this than I am the current iPad mania.
> >> Please, -please- let the multitasking rumours be true.
> >> <http://www.macrumors.com/2010/04/05/iphone-os-4-0-preview-event-sched....>
>
> >The problem is that the iPad has just 256MB of RAM. This will mean some
> >tight limits for multitasking and with no virtual memory the thing will
> >run out of RAM very soon.
>
> iPhoneOS supports VM (unsurprisingly, since it's Darwin under the
> hood) but doesn't have any enabled under normal circumstances. I read
> some tales of enabling it on't Web somewhere, but can't find it now.
>
>         Cheers - Jaimie
> --
> My swerver room, my patch panels. By the time they figure out why none of the
> ports on their floor box work anymore I'll be done, dusted and down the pub
> with a pint of something brewed with yeast that was smarter than they are..
>                                                     -- Matt S Trout, asr

I've enabled VM on my iPhone. Tried it for a day then took it off -
it does work, but it's glacially slow when in use. I prefer the bomb-
out-of-the-app-to-springboard to the lock-up-for-several-minutes.
Wouldn't bother.
From: Jaimie Vandenbergh on 6 Apr 2010 04:59
On Tue, 6 Apr 2010 01:52:08 -0700 (PDT), Ric <infobubble(a)gmail.com>
wrote:

>On 5 Apr, 21:35, Jaimie Vandenbergh <jai...(a)sometimes.sessile.org>
>wrote:
>> On Mon, 05 Apr 2010 21:29:50 +0200, Jochem Huhmann <j...(a)gmx.net>
>> wrote:
>>
>> >Ian McCall <i...(a)eruvia.org> writes:
>>
>> >> Must admit I'm more interested in this than I am the current iPad mania.
>> >> Please, -please- let the multitasking rumours be true.
>> >> <http://www.macrumors.com/2010/04/05/iphone-os-4-0-preview-event-sched...>
>>
>> >The problem is that the iPad has just 256MB of RAM. This will mean some
>> >tight limits for multitasking and with no virtual memory the thing will
>> >run out of RAM very soon.
>>
>> iPhoneOS supports VM (unsurprisingly, since it's Darwin under the
>> hood) but doesn't have any enabled under normal circumstances. I read
>> some tales of enabling it on't Web somewhere, but can't find it now.

>I've enabled VM on my iPhone. Tried it for a day then took it off -
>it does work, but it's glacially slow when in use. I prefer the bomb-
>out-of-the-app-to-springboard to the lock-up-for-several-minutes.
>Wouldn't bother.

Apple non-optimising for stuff they don't do officially? Unheard of!

On top of which the dev tools do give app authors facility to save an
app's current state and then begin there again when you re-launch, so
unless you want some continuous background work (audio, GPS, data
streaming etc) it's hardly necessary to swap stuff out.

Cheers - Jaimie
--
To every complex problem there is a solution which is simple, neat and wrong.
-- HL Mencken
From: Adrian C on 6 Apr 2010 05:57
On 05/04/2010 22:43, Jochem Huhmann wrote:
> Even with VM (which I suspect *will* have to be enabled to avoid
> surprises that are more harmful than the thing slowing down)
> multitasking will at least force you to handhold the system (quitting
> apps in the background you aren't needing anymore, decide if you want to
> really quit or just background the app you're leaving and so on). I just
> hope Apple will make that straight and easy.
>

Yup, I hope so as well, but fear their task switching solution will be
just as silly as the stack of pages shown as just visited in iPhone
Safari, which I find annoying to keep clearing so that I can have a new
untitled page to start surfing from.

--
Adrian C
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