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Mystery: certain urls load slowly, others not, only on one MPB

873 Views 21 Replies Latest reply: Jun 20, 2013 10:39 AM by bug00 RSS
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bug00 Level 1 Level 1 (45 points)
Currently Being Moderated
Jun 17, 2013 9:01 AM

Forgive me if I haven't found the right category under which to share this mystery.  But I just wanted to throw this really strange online experience out there, and see if you all had any ideas.


My MacBookPro is bogging down on two particular urls (taking over 30 seconds to load).  All other urls load quickly, as normal.  I happen to know that those two particular sites are hosted on the same GoDaddy I immediately thought there was a problem with the GoDaddy server.


HOWEVER, there are two identical model MacBookPros in my household, both operating on the same wireless network.  So I decided to do a side-by-side comparison of load times.  On my husband's MBP, those same urls load and/or refresh very quickly, within 2 seconds.  (These results are consistant.)  Since he is experiencing NO delay in load time...I then assumed that it could not be the server's fault. 


Other clues?  The main difference between the two laptops is that mine is running 10.8.4 and my husband's is running 10.8.3.  However, I cannot blame Safari, because the same load delay occurs for me on Safari, Firefox and Chrome.  (On my husband's MPB, the sites load quickly on all three browsers.)


Both MBPs have the same DNS settings (through the Airport Extreme)...although I did try OpenDNS servers to see if that helped.  It did not.


I cannot think of what could be the culprit for this slowdown that occurs ONLY when connecting to sites hosted on this one particular GoDaddy server, from ONLY one particular laptop on a network, even while utilizing 3 different browsers.


If anyone has any ideas...I thank you.

MacBook Pro, OS X Mountain Lion (10.8.4), Airport Extreme Dual Ethernet
  • Eric Root Level 6 Level 6 (13,850 points)

    Two suggestions.


    1. Under the Safari menu, select 'Reset Safari'. You may not want to reset everything, such as 'saved names and passwords'.


    2. Delete the Safai .plist.


    Quit the application.

    You need to look in your user Library/Preferences for the .plist. Hold down the option key while using the Finder Go To Folder command. Enter ~/Library/Preferences/  Move the .plist to your desktop.

    Open the application and test. If it works okay, delete the plist(s) from the desktop.

    If the application is the same, return the .plist(s) to where you got them from, overwriting the newer ones.

    If you prefer to make your user library permanently visible, use the Terminal command found below.

    You might want to bookmark the command. I had to use it again after I installed 10.8.4. I have also been informed that if you drag the user library to Finder it will remain visible.

    If that works with Safari, try the same steps for Firefox and Chrome.

  • Calculating status...



    Have you tried to change the DNS server in  > System Prefference > Network > "Network adapter" > Advance > DNS > and add google´s DNS servers?


    Google´s Public DNS

  • Linc Davis Level 10 Level 10 (107,625 points)

    Please post a link to one of the pages in question.

  • Linc Davis Level 10 Level 10 (107,625 points)

    Triple-click the word "curl" in the line below to select the whole line:

    time curl -I


    Copy the selected text to the Clipboard (command-C).


    Launch the Terminal application in any of the following ways:


    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


    ☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


    ☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.


    Paste into the Terminal window (command-V).


    You should almost instantly get several lines of output, the first of which begins with something like this:




    Below that you'll see three lines beginning with the words "real," "user," and "sys." Post only the first of those three lines.


    If there's no output within five seconds, consider that a failure. You can then quit Terminal.

  • Linc Davis Level 10 Level 10 (107,625 points)

    That means the problem is not caused by your browser. It's a network or system issue. The network is apparently ruled out by your results.


    Please read this whole message before doing anything.

    This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.

    The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, or by a peripheral device.


    Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
    Safe mode is much slower to boot and run than normal, and some things won’t work at all, including Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.

    The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.


    Test while in safe mode. Same problem?


    After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

  • Linc Davis Level 10 Level 10 (107,625 points)

    What do you get with other sites, such as this:

    time curl -I
  • Linc Davis Level 10 Level 10 (107,625 points)

    Double-click the line of text below to select it, then copy it to the Clipboard (command-C):



    Launch the Network Utility application in any of the following ways:


    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


    ☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


    ☞ Open LaunchPad. Click Utilities, then Network Utility in the icon grid.


    Step 1


    Select the Lookup tab and paste into the address field (command-V). Press return. Post the output that appears below – the text, please, not a screenshot.


    Step 2


    Select the Ping tab and do the same. Please enter the same input as you did in Step 1. Don't use the output of Step 1 as input to Step 2.


    Note: Some browsers and mail clients will automatically complete a domain name such as "" to a URL, such as That will interfere with the test. If necessary, edit the input in the Network Utility window to remove any added characters.

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