HT4623 Will my ipad become slow if i update my i pad software

Will my ipad become slow if i update my i pad software

I would think twice about updating with an iPhone 4S. Look around the forums to see many people are sorry they did. Not because iOS 7 is bad, but because the 4S is much too slow to run it well.
And no, you will not lose your contacts but backup first.

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First off, i think it's sad that i have to use my non apple device to post this question... Why has my iPad become absolutely useless after updating to iOS 8.1? I am unable to use my mini because it crashes, slow performance, major battery drain.

First off, i think it's sad that i have to use my non apple device to post this question... Why has my iPad become absolutely useless after updating to iOS 8.1? I am unable to use my mini because it crashes, slow performance, major battery drain.

Restore iPad to Factory Default; do not restore from backup. It may be the cause of the problem.
Settings>General>Reset>Erase all content and settings

Will java programs become slower with generics?

This is not a question, more lika general discussion. I'd like to know what you think.
I fear that the average java developer will become accustom to the new features of java and write inefficient code. I have included a sample program that shows new code vs. old code. Altough the new code is esier to read, it's also alot slower.
For instance the foreach instruction is using an iterator which is created and then iterated. When the loop exits the Iterator is garanage collected. Better performance would be achieved if there was a "Getable" interface of some sort was implemented and that the foreach simply asked the collections class for the next object in line. Perhapps if the ArrayList cached it's Iterator objects, somehow. (I'm not suggesting any of the solutions above. I'm just trying to make a point.)
Also regarding generics and enumerations it's easy to see how they will slow down the application. It gets even scarier when you consider that important foundation classes are updated with these new features. A small change in some AWT class may have unforeseen repercussions throughout all gui applications.
Gafter, if you read this, is there any tests made to see if this is true. Is performance affected by the new features? Will old style code be replace by new style code in the foundation classes (awt/swing/.../... etc.).
ArrayList<String> ss = new ArrayList<String>();
for (int i = 0; i < 100; i++) ss.add("hello");
// "new" java ... completes in 6.43 seconds
long t1 = System.nanoTime();
for (int i = 0; i < 1000000; i++)
     for (String s : ss)
System.out.println(System.nanoTime()-t1);
// "old" java ... completes in 2.58 seconds
long t2 = System.nanoTime();
for (int i = 0; i < 1000000; i++)
     for (int j = 0, size = ss.size(); j < size; j++)
          String s = ss.get(j);
System.out.println(System.nanoTime()-t2);

Adapting Neal's example for JDK 1.4:
    private static final String[] strArray = new String[0];
    private static void withToArray() {
        List ss = new ArrayList();
        for (int i = 0; i < 100; i++) ss.add("hello");
        long t1 = System.currentTimeMillis();
        for (int i = 0; i < 1000000; i++)
            String[] ssArray = (String[]) ss.toArray(strArray);
            for (int j=0; j < ssArray.length; j++) {
                String s = ssArray[j];
        System.out.println(System.currentTimeMillis()-t1);
    private static final String[] strArray100 = new String[100];
    private static void withToArrayAndCheatingOnLength() {
        List ss = new ArrayList();
        for (int i = 0; i < 100; i++) ss.add("hello");
        long t1 = System.currentTimeMillis();
        for (int i = 0; i < 1000000; i++)
            String[] ssArray = (String[]) ss.toArray(strArray100);
            for (int j=0; j < ssArray.length; j++) {
                String s = ssArray[j];
        System.out.println(System.currentTimeMillis()-t1);
    private static void withToArrayAndCheatingOnLengthLocalVar() {
        List ss = new ArrayList();
        for (int i = 0; i < 100; i++) ss.add("hello");
        final String[] localStrArray100 = new String[100];
        long t1 = System.currentTimeMillis();
        for (int i = 0; i < 1000000; i++)
            String[] ssArray = (String[]) ss.toArray(localStrArray100);
            for (int j=0; j < ssArray.length; j++) {
                String s = ssArray[j];
        System.out.println(System.currentTimeMillis()-t1);
    } Allocating the string[] every time: 5812
Allocating the correctly sized string[] once, as a private final static: 2953
Allocating the correctly sized string[] once, as a final local var: 3141
Interesting that the private final static is 90ms faster than the local variable, fairly consistently.
What's interesting about that though, is that we're not iterating strArray100, we're iterating over ssArray, so its not clear why it should make a difference. If I modify things a little more:
    private static void withToArrayAndLoopOptimization() {
        List ss = new ArrayList();
        for (int i = 0; i < 100; i++) ss.add("hello");
        long t1 = System.currentTimeMillis();
        for (int i = 0; i < 1000000; i++)
            String[] ssArray = (String[]) ss.toArray(strArray100);
            final int length = ssArray.length;
            for (int j=0; j < length; j++) {
                String s = ssArray[j];
        System.out.println(System.currentTimeMillis()-t1);
    private static void withToArrayAndLoopOptimizationLocalVar() {
        List ss = new ArrayList();
        for (int i = 0; i < 100; i++) ss.add("hello");
        final String[] localStrArray100 = new String[100];
        long t1 = System.currentTimeMillis();
        for (int i = 0; i < 1000000; i++)
            String[] ssArray = (String[]) ss.toArray(localStrArray100);
            final int length = ssArray.length;
            for (int j=0; j < length; j++) {
                String s = ssArray[j];
        System.out.println(System.currentTimeMillis()-t1);
    } With private static final and loop optimization: 2937
With local variable and loop optimization: 2922
Now the different has disappeared: in fact, the numbers are exactly the same on many runs. You have to make 'length' final to get the best speed.
I guess I'm disappointed that in 2004, Java 1.4 javac & Hotspot combined still cannot spot the simplest loop optimization in the book.... always assuming that's actually causing the preformance difference. My gut is telling me its something else causing the difference because all of the inner loops are iterating over ssArray, not strArray100 (wherever that happends to be declared).
Someone care to run Neal's example on 1.5 and see if they've managed to optimize further under the covers?

HT4623 will the ipad 1st generation take updates past ios 5.1.1? i have not been able to update to ios 6.

Will the 1st generation Ipad take updates past ios 5.1.1? I have not been able to update to ios 6.

5.1.1 is the highest for the first generation iPad.

Why has my Ipad become slow when loading Keynote presentations?

I use Keynote on Ipad as a presentation tool. Recently, the Ipad has been slow to load a presentation (up to 3 seconds after selecting a particular presentation). It also randomly updates presentations that haven't been used recently. Any thoughts?

Restore iPad to Factory Default; do not restore from backup. It may be the cause of the problem.
Settings>General>Reset>Erase all content and settings

HT4623 My ipad is slow but all updated ......what I can I do

I clean cookies and cache. And it still runs slow help!

Hello Irishbabby,
I would be concerned too if my iPad was running slowly. I recommend reviewing the steps in this tutorial and testing after each step to see if the speed has improved (you can skip step 2):
Frozen or unresponsive iPad
http://www.apple.com/support/ipad/assistant/ipad/
Thank you for using Apple Support Communities.
Best,
Sheila M.

Ipad very slow since ios8 update....

I Updated to iOS 8 last week, no issues prior re speed etc, now it's slow, boring and very frustrating. search engines/ facebook etc take forever to load. Any ideas how to fix this, can I revert back to iOS 7?? I'm using ipad 4th gen.

have you had any response on this. my icon symbols have all disappeared too and typing is stuttery. Have you had this too ?

HT4623 Hi, every body please help trying to update my I pad with new iOS but there is no soft wear update tab what I am doing wrong

Hi,
all trying to update my iPad with new iOS but when in the settings tab there is no software update tab
What I am doing wrong please or i,m going to throw it

The Settings > General > Software Update option only appears when you have iOS 5+ installed, if you have iOS 4 then you will need to do the update via your computer's iTunes as described half-way down the page that you posted from.
Connect the iPad to your computer's iTunes and copy any purchases off the iPad to your computer via File > Transfer Purchases (File > Devices > Transfer Purchases on iTunes 11). You may also want to copy photos and any important documents off the iPad as well e.g. via the file sharing section at the bottom of the device's apps tab when connected to iTunes, via wifi, email, dropbox etc - they should be included in the backup, but it's best to have a copy of them outside of the backup just in case. You can then force a backup of the iPad by right-clicking the iPad 'Device' on the left-hand sidebar of iTunes and selecting 'Backup' (on iTunes 11 you can enable the left-hand sidebar via option-command-S on a Mac, control-S on a PC)
Then start the update by selecting the iPad on the left-hand sidebar, and on the Summary tab on the right-hand side clicking the Check For Updates button
Updating to iOS 5+ : http://support.apple.com/kb/HT4972
A first gen iPad will be updated to iOS 5.1.1, and an iPad 2 and 3 to iOS 6.1.3

We've purchased applications off of iTunes. Will we lose these when we update to 5.0 software?

We've purchased applications off of iTunes.
Will we lose these applications when we update to 5.0 software?

you shouldn't. Be sure to backupp your iPad before you do the upgrade.
what should happen is that you hook up the iPad, download the iOS5, it installs it, which wipes the iPad, then iTunes automatically restores your apps and settings from backup.
Worst case scenario, as long as iTunes doesn't glitch, it knows what you've downloaded and you can redownload at no cost.
When I did the iOS upgrade, I did it on a new iPad (mine had an issue and I had just exchanged it for a new one) I made my new iPad a restore of my old one, did the upgrade, and my n ew one was an exace replica of my old one, minus a week (it'd been a week since my last backup)

HT4623 i have dought if my iphone 4 will not work properly, as i heard it become slow after update ios7 , can someone help me out what to do.. ?

i have dought if my iphone 4 will not work properly, as i heard it become slow after update ios7 , can someone help me out what to do.. ?

Hello there, morganbailey02.
The following Knowledge Base article provides some great steps for troubleshooting your issue:
iOS: Unable to update or restore
http://support.apple.com/kb/HT1808
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro

Hi i cant download any games.. i have internet connection. before i was able to do it but this past few days i cant it says cannot connect to itunes store i didnt update my ipad to ios 7 because it will make my ipad very slow like whT happen to my iphone,

hi i have ipad mini i cant download any games.. i have internet connection. before i was able to do it but this past few days i cant it says cannot connect to itunes store i didnt update my ipad to ios 7 because it will make my ipad very slow like whT happen to my iphone, is that the reason y i cant
download games anymore?

Try This...
Close All Open Apps... Sign Out of your Account... Perform a Reset... Try again...
Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
http://support.apple.com/kb/ht1430
If no joy...
Reset all settings
Settings > General > Reset > Reset all Settings.
This will return all iDevice settings to factory defaults... you will not lose any data.... But you will have to re-enter all of the device settings.

If I upgrade my iphone 3Gs to iOS5 then whether its speed will reduce or it will become slow because its processor is only 600 MHZ ? If it is so then whether it should be upgrarded to iOS4 ?

If I upgrade my iphone 3Gs to iOS5 then whether its speed will reduce or it will become slow because its processor is only 600 MHZ ? If it is so then whether it should be upgrarded only to iOS4 ?
Thanks,
PRANAJ

I'm running iOS 5 on my 3GS, and it runs fine, granted it's not as fast as a 4 or 4S, but it will still run fine.

Typing has become slow in ipad mini after upgrade to Io7

typing has become slow in ipad mini after upgrade to io7.
everywhere in Browsers, mail & everywhr.

Reset all settings
Settings>General>Reset>Reset All Settings

HT4623 When will the iPad Air be available in Malaysia?

When will the iPad Air be available in Malaysia?

No one here can answer this question. I'm sure Apple will announce it.

HT4623 My iPad will not come on. When I updated it, I did not plug it into the outlet. What do I need to do?

My iPad will not come on. When I updated the settings, I did not plug it into the outlet. What do I need to do to get it to come on?

First try a Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least Ten seconds... (But can take Longer)... until the Apple logo appears. Release the Buttons
If no joy... Try a Restore...
1: Connect the device to Your computer and open iTunes.
2: If the device appears in iTunes, select and click Restore on the Summary pane.
Restoring > http://support.apple.com/kb/HT1414
3: If the device doesn't appear in iTunes, try using the Steps in this article to force the device into Recovery Mode.
Make sure you have the Latest Version of iTunes (v11.1.5) Installed on your computer
iTunes free download from www.itunes.com/download

HT4623 Will my ipad become slow if i update my i pad software

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