Re: Reboot? Slow First Run
Re: Reboot? Slow First Run
- Subject: Re: Reboot? Slow First Run
- From: "gMail.com" <email@hidden>
- Date: Thu, 03 Dec 2009 17:10:47 +0100
- Thread-topic: Reboot? Slow First Run
Thanks. I supposed that I was loading from the cache. It's a pity.
It was too nice to load 10,000 files x 4KB each, in only 1.2 secs.
Maybe one day, when I will be not longer on this planet :-)
Just to mention I run MacOSX 10.6.2 and I build against 10.5 (32 bit).
Anyway I would like to say a thing that I wanted to say for years.
Despite to the faster and faster processors and machines, the better and
better OSs... still today with a Core 2 Duo Intel 2.4GHz and MacOS X 10.6.2
at 64 bits (which is considered mainly as an improvement of the stability
and speed), when I open my /Applications folder, I have to wait for 3, 4 or
5 seconds to see the contents of the folder. I recall that my Mac II with
the System Mac 1.0 (in 1988) was faster. Think over ;-)
Regards
--
Leonardo
> Da: Shawn Erickson <email@hidden>
> Data: Thu, 3 Dec 2009 07:38:11 -0800
> A: "gMail.com" <email@hidden>
> Cc: <email@hidden>
> Oggetto: Re: Reboot? Slow First Run
>
> On Thu, Dec 3, 2009 at 3:47 AM, gMail.com <email@hidden> wrote:
>> Hi,
>> my app executes a given task in 1.2 seconds, all the time. I can quit the
>> application, relaunch it, run the same task several times and it always
>> takes 1.2 seconds.
>> But if I reboot the machine, I launch the application and run the same task
>> for the first time, it takes 13 seconds! This problem occurs at any reboot.
>> Then if I run the task again it always takes 1.2 seconds.
>
> The OS maintains a cache of data in RAM as much as it can while
> running. This "universal buffer cache" caches pages of data from
> loaded files, applications, etc.
>
> So the long initial load time is likely a result of having to load the
> data you need from disk (and possibly bringing online services your
> application needs that haven't yet been needed by other applications).
> The later load times are loading data from cache hence much much
> faster.
>
> -Shawn
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