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I was consistently getting 17 second cold boots with my rMBP. I upgraded to ML today and am now getting cold boot times of 12 seconds.

Wow!

I'd hope so. Lion wasn't exactly made for rMBP, it was just adjusted later on for it. ML was probably made with the retina MBP in mind. Everything will probably keep getting better for you guys from now on :p.
 
I was consistently getting 17 second cold boots with my rMBP. I upgraded to ML today and am now getting cold boot times of 12 seconds.

Wow!

My rMBP was taking less than 10 seconds, by quite some margin, to boot from cold. There might be something in your startup items affecting boot times.
 
My cMBP is doing it in 8 seconds...

That's like a rodeo bronc rider.

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My rMBP was taking less than 10 seconds, by quite some margin, to boot from cold. There might be something in your startup items affecting boot times.

Possibly. I do have CrashPlan, Caffeine, gfxCardStatus, Alfred, and DropBox in my Login items.

How do I find the ones starting at boot that are not part of ML?
 
That's like a rodeo bronc rider.

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Possibly. I do have CrashPlan, Caffeine, gfxCardStatus, Alfred, and DropBox in my Login items.

How do I find the ones starting at boot that are not part of ML?

System prefs > Asers & Groups > Click the 'Login Items' tab.

I have everything unchecked apart from the vital things such as ituneshelper.
 
It's pretty awesome to have these computers boot this fast - then again there is not much need to ever turn the computer off. The only real exception I can think of is bootcamp, or maybe while traveling to save battery.
 
System prefs > Asers & Groups > Click the 'Login Items' tab.

I have everything unchecked apart from the vital things such as ituneshelper.

Unchecking/checking only unhides/hides apps at launch.

To stop them loading you need to remove them from the list completely.
 
Guys, how many times do you reboot per day? I do it every 2 to 3 weeks :D

its good to reboot everyother day. refreshes everything. i turn my MBP off at night if i know i wont be using it for the next day or so between work and all. sometimes ill turn it off at 10 pm and wont come back on until 6pm or so the next day. so i turn it off.
 
My rMBP boots from power on to logon screen in 8 seconds on Lion. I'm about to get Mountain Lion today, just waiting for the code.
 
Guys, how many times do you reboot per day? I do it every 2 to 3 weeks :D

It varies, I try not to exceed 15 times in one day.

ha...ha...ha...ha..

Ok, I'll be serious (maybe).

I removed the hard drive in my late 15" MBP, replacing it with a 512GB Samsung 830 SSD. I only reboot it once in a while, perhaps every week or so. My cold boot to the desktop time, is about 10 seconds. I say about, as I timed it, but it's normal for it to vary by a second or so. It's so fast I don't pay attention anymore.
 
System prefs > Asers & Groups > Click the 'Login Items' tab.

I have everything unchecked apart from the vital things such as ituneshelper.

ituneshelper isn't a vital process. It's what opens iTunes automatically when you plug in an iPod or iOS device, which is something I hate. I delete it - win win.
 
(2) 512GB Samsung SSDs in RAID 0. Don't get butt hurt.

You do realize your BIOS has to load your RAID drivers so using any RAID configurations actually slows down your boot by a second or two. A modern SSD is fast enough that two or four or ten in RAID won't make a difference for booting.
 
You do realize your BIOS has to load your RAID drivers so using any RAID configurations actually slows down your boot by a second or two. A modern SSD is fast enough that two or four or ten in RAID won't make a difference for booting.

Yea, a non-RAID configuration shaves 2 seconds max during boot. But what about after boot? A RAID configuration saves butt loads more time.
 
i have (2) 256gb Samsung 830's in raid 0 and it take me 14 seconds to boot from the moment i press the power button to a fully loaded desktop. 8 seconds seems beastly!
 
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