Poor USB Speed Issues

Connecting anything to my machine via USB has become painfully slow. When connecting an iPod to the USB port on the front of the machine, a window will sometimes popup saying "You are connecting to a USB 1.1 port - connect to a 2.0 port to ....etc etc"
It IS a USB 2.0 port - Do the internal USB controllers go bad after a while? My machine has a lot of time on it and cannot think of anything else that could be the cause.
And if so, what do I replace?

Hi. The Apple Official on USB problems is here
http://docs.info.apple.com/article.html?artnum=303598
Although not mentioned there, sometimes using the FireWire reset procedure (bottom of the page here) helps USB
http://docs.info.apple.com/article.html?artnum=88338
USB on G5s has always been a bit suspect where USB power is concerned. Does it work ok plugged into the rear ports? A powered USB hub, such as
http://catalog.belkin.com/IWCatProductPage.process?Product_Id=159070
sometimes helps.
The USB is on the main logic board (as are most things), so a PCI USB card would be required if it is duff.
Good Luck.

Similar Messages

Yoga 13 Extremely Poor Wifi Speeds

I currently have the most recent driver installed(1.04.0213) and all other current W8 updates are installed, but I am still experiencing poor WiFi performance. I have also changed the wireless adapter setting power saving mode to Maximum Performance for both the "On battery" and "Plugged in" options in Windows 8's advanced power options menu.
I also have the following options set on the advanced tab for the Realtek WLAN card:
Antenna Diversity Type: 1
Bandwidth: 20_40Mhz
Selective Suspend: Disabled
Selective Suspend Timeout: 60
WiFi Config: Performance
After the most recent driver update, my connectivity issues were resolved, but my speed issues were not. My current set up is as follows:
PC: Lenovo Yoga 13 w/Realtek RTL8732A Wireless LAN 802.11n
Router: RT-N56U IEEE 802.11 a/b/g/n, IEEE 802.3/3u/3ab (Firmware is up to date)
I rarely am able to exceed 10 Mbps and am lucky to average between 1-2 Mbps. I currently pay for Frontier Fios Internet rated at 35 Mbps down and 15 Mbps up. Websites take a ridiculous amount of time to load and YouTube videos can't be played without constant buffering.
Every other device that I have connected to my router, whether they are hard wired or wireless, is able to maintain 30-35 Mbps, even at peak usage times. I currently have a MacBook Pro, an iPad 3, HTC One(M7), Iphone 5, Asus Essentio, and an Asus X54C laptop that are all operating as expected on my network.
I know similar threads exist on the message boards for the Yoga 13, but none of the "Solutions" address this issue. Please address this issue and post a solution that is a permanent fix for this laptop! It has the potential to be an amazing device, but the WiFi issues are keeping it from reaching its true potential!

Dear anihilist
Welcome in Lenovo forums
Please try to update the driver using the below link
Link : http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS031976
Please let me know once you done
Thanks
Alaa
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Another Yosemite speed issue

This is yet another Yosemite speed issue. I've done some reading around and read the FileVault can cause an issues, I took a look and I've always have FileVault disabled. I installed EtreCheck and the results came up with a lot of RED and "FAILED". Unfortunately, I have no clue how to being to read this and was hoping someone could shed some light onto this for me.
Here are my results: (Just trying to right-click and paste this took almost a minute)
Problem description:
Installed OS X Yosemite and now Macbook runs extremely slow. I have had FileVault disabled the entire time.
EtreCheck version: 2.0.11 (98)
Report generated November 13, 2014 at 12:26:09 PM EST
Hardware Information: ℹ️
MacBook (13-inch, Late 2009) (Verified)
MacBook - model: MacBook6,1
1 2.26 GHz Intel Core 2 Duo CPU: 2-core
2 GB RAM Upgradeable
BANK 0/DIMM0
1 GB DDR3 1067 MHz ok
BANK 1/DIMM0
1 GB DDR3 1067 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
NVIDIA GeForce 9400M - VRAM: 256 MB
Color LCD 1280 x 800
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 23:21:15
Disk Information: ℹ️
TOSHIBA MK2555GSXF disk0 : (250.06 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / [Startup]: 249.20 GB (143.68 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
MATSHITADVD-R   UJ-898
USB Information: ℹ️
Apple Inc. Built-in iSight
Apple Inc. BRCM2070 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. Apple Internal Keyboard / Trackpad
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/System/Library/Extensions
[not loaded] com.devguru.driver.SamsungComposite (1.4.25 - SDK 10.6) Support
/System/Library/Extensions/ssuddrv.kext/Contents/PlugIns
[not loaded] com.devguru.driver.SamsungACMControl (1.4.25 - SDK 10.6) Support
[not loaded] com.devguru.driver.SamsungACMData (1.4.25 - SDK 10.6) Support
[not loaded] com.devguru.driver.SamsungMTP (1.4.25 - SDK 10.5) Support
[not loaded] com.devguru.driver.SamsungSerial (1.4.25 - SDK 10.6) Support
Problem System Launch Agents: ℹ️
[failed] com.apple.CallHistoryPluginHelper.plist
[failed] com.apple.CallHistorySyncHelper.plist
[failed] com.apple.cloudd.plist
[failed] com.apple.cmfsyncagent.plist
[failed] com.apple.coreservices.appleid.authentication.plist
[failed] com.apple.EscrowSecurityAlert.plist
[failed] com.apple.gamed.plist
[failed] com.apple.Maps.pushdaemon.plist
[failed] com.apple.nsurlsessiond.plist
[failed] com.apple.telephonyutilities.callservicesd.plist
[failed] com.apple.xpc.loginitemregisterd.plist
Problem System Launch Daemons: ℹ️
[failed] com.apple.AssetCacheLocatorService.plist
[failed] com.apple.awdd.plist
[failed] com.apple.ctkd.plist
[failed] com.apple.findmymac.plist
[failed] com.apple.icloud.findmydeviced.plist
[failed] com.apple.ifdreader.plist
[failed] com.apple.nehelper.plist
[failed] com.apple.nsurlsessiond.plist
[failed] com.apple.periodic-daily.plist
[failed] com.apple.softwareupdate_download_service.plist
[failed] com.apple.systemstats.analysis.plist
[failed] com.apple.wdhelper.plist
[failed] com.apple.xpc.smd.plist
Launch Agents: ℹ️
[loaded] com.google.keystone.agent.plist Support
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist Support
[loaded] com.google.keystone.daemon.plist Support
[loaded] com.microsoft.office.licensing.helper.plist Support
User Launch Agents: ℹ️
[loaded] com.adobe.ARM.[...].plist Support
[loaded] com.macpaw.CleanMyMac.helperTool.plist Support
[loaded] com.macpaw.CleanMyMac.trashSizeWatcher.plist Support
[loaded] com.macpaw.CleanMyMac.volumeWatcher.plist Support
User Login Items: ℹ️
smcFanControl Application (/Applications/smcFanControl.app)
Dropbox Application (/Applications/Dropbox.app)
Mail Application (/Applications/Mail.app)
KiesAgent ApplicationHidden (/Applications/Kies.app/Contents/MacOS/KiesAgent.app)
fuspredownloader ApplicationHidden (/Users/[redacted]/Library/Application Support/.FUS/fuspredownloader.app)
Internet Plug-ins: ℹ️
o1dbrowserplugin: Version: 5.38.6.0 - SDK 10.8 Support
Default Browser: Version: 600 - SDK 10.10
npTGEQPlugin: Version: 7.5.1 Support
Silverlight: Version: 5.1.20513.0 - SDK 10.6 Support
FlashPlayer-10.6: Version: 15.0.0.152 - SDK 10.6 Support
Flash Player: Version: 15.0.0.152 - SDK 10.6 Mismatch! Adobe recommends 15.0.0.223
QuickTime Plugin: Version: 7.7.3
googletalkbrowserplugin: Version: 5.38.6.0 - SDK 10.8 Support
SharePointBrowserPlugin: Version: 14.4.3 - SDK 10.6 Support
AdobePDFViewer: Version: 9.5.5 Support
iPhotoPhotocast: Version: 7.0 - SDK 10.8
JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
User Internet Plug-ins: ℹ️
fbplugin_1_0_3: Version: (null) Support
ATTConnectEventEntry: Version: 1.0.0 - SDK 10.6
fbplugin_1_0_1: Version: (null) Support
Safari Extensions: ℹ️
Searchme
Slick Savings
Amazon Shopping Assistant
Ebay Shopping Assistant
3rd Party Preference Panes: ℹ️
Flash Player Support
Time Machine: ℹ️
Skip System Files: NO
Mobile backups: OFF
Auto backup: NO - Auto backup turned off
Volumes being backed up:
Macintosh HD: Disk size: 249.20 GB Disk used: 105.52 GB
Destinations:
Time Machine Backups [Local]
Total size: 0 B
Total number of backups: 0
Oldest backup: -
Last backup: -
Size of backup disk: Too small
Backup size 0 B < (Disk used 105.52 GB X 3)
Top Processes by CPU: ℹ️
      3% Google Chrome
      2% WindowServer
      1% coreaudiod
      0% airportd
      0% smcFanControl
Top Processes by Memory: ℹ️
84 MB Google Chrome Helper
79 MB Google Chrome
43 MB Finder
39 MB mds
32 MB Mail
Virtual Memory Information: ℹ️
79 MB Free RAM
571 MB Active RAM
447 MB Inactive RAM
385 MB Wired RAM
46.88 GB Page-ins
1.25 GB Page-outs

Uninstalling Software: The Basics
Most OS X applications are completely self-contained "packages" that can be uninstalled by simply dragging the application to the Trash. Applications may create preference files that are stored in the /Home/Library/Preferences/ folder. Although they do nothing once you delete the associated application, they do take up some disk space. If you want you can look for them in the above location and delete them, too.
Some applications may install an uninstaller program that can be used to remove the application. In some cases the uninstaller may be part of the application's installer, and is invoked by clicking on a Customize button that will appear during the install process.
Some applications may install components in the /Home/Library/Applications Support/ folder. You can also check there to see if the application has created a folder. You can also delete the folder that's in the Applications Support folder. Again, they don't do anything but take up disk space once the application is trashed.
Some applications may install a startupitem or a Log In item. Startupitems are usually installed in the /Library/StartupItems/ folder and less often in the /Home/Library/StartupItems/ folder. Log In Items are set in the Accounts preferences. Open System Preferences, click on the Accounts icon, then click on the LogIn Items tab. Locate the item in the list for the application you want to remove and click on the "-" button to delete it from the list.
Some software use startup daemons or agents that are a new feature of the OS. Look for them in /Library/LaunchAgents/ and /Library/LaunchDaemons/ or in /Home/Library/LaunchAgents/.
If an application installs any other files the best way to track them down is to do a Finder search using the application name or the developer name as the search term. Unfortunately Spotlight will not look in certain folders by default. You can modify Spotlight's behavior or use a third-party search utility, EasyFind, instead.
Some applications install a receipt in the /Library/Receipts/ folder. Usually with the same name as the program or the developer. The item generally has a ".pkg" extension. Be sure you also delete this item as some programs use it to determine if it's already installed.
There are many utilities that can uninstall applications. Here is a selection:
    1. AppZapper
    2. AppDelete
    3. Automaton
    4. Hazel
    5. AppCleaner
    6. CleanApp
    7. iTrash
    8. Amnesia
    9. Uninstaller
10. Spring Cleaning
For more information visit The XLab FAQs and read the FAQ on removing software.

Sg-200-08 poor udp speed

Hi all,
I'm experiencing poor udp speed on my sg-200-08.
I'm running a nfs share on ubuntu server 12.04 to a ubuntu 11.10 client connected through udp protocol .
If I use an unmanaged sitecom (plastic crap) I get about 50MB/s transfers, with sg-200-08 I can't get over 12/13 MBs transfers.
I've tried to set on both server and client MTU = 1492 and I've changed firmware from 1.0.3.3 to 1.0.5.1 (I've not tested 1.0.6
because of some posts here regarding udp problems).
Can someone help me to resolve it?
Regards Carmine

If that didn't fix it, there is an external factor. It can be a negotiation issue. Try setting the port speeds to manual such as 1000 full on each side or 100 full depending what the switch connects to.
You may also try to disable spanning tree globally.
-Tom
Please mark answered for helpful posts

USB speeds on late 2012 model Macbook Pro

I recently bought a new Macbook Pro (without retina display) to replace the 15" MBP I bought in 2006. The USB speeds are extremely slow. For example, I transferred a 650 MB file from the new MBP to a thumb drive. It took more than 45 minutes. When I then transferred to my 2006 MBP it took less than 4 minutes. Both are running Lion. What gives? Is there a configuration issue or is there a problem with my USB ports in my machine?

How to reset SMC like Shootist007 said: http://support.apple.com/kb/HT3964
or try resetting PRAM: http://support.apple.com/kb/PH4405

WRT54G ver 7 speed issues.

Hi all.
Let me go through the issue I have come across tonight. I have a WRT54G version 7 cable router, and I have Telewest as my ISP, with the 4Mb service. My computer is hard wired into the router, and have no wireless clients connected at the time. I get packet loss, (quite a bit) and my download speeds are abismal. Setting my computer to dhcp or fixed IP makes no difference. I even forced 100 Full duplex on the LAN card just to be sure. I phoned up TW tech support, and they were pretty helpful, and asked me to bypass the router, and plug directly into the modem and turn dhcp on my pc and reboot the modem.
All works fine, no speed issues, download test from here is perfect. They asked me to download something off their server here http://gamefiles.blueyonder.co.uk and I am getting full 480kB/s And here is the test plugged right into the modem http://www.thinkbroadband.com/speedtest/results/id/117018476054017621619.html
Happy days, right? Problem with the router, right?
Well.. It gets interesting.
I then do a firmware update on the router, reset it to factory defaults, and re-run the test going through the router. Here is the pitiful result., which is the same as before. http://www.thinkbroadband.com/speedtest/results/id/117018491367303621734.html
Ok... so problem with the router still... right?
I tried the blueyonder file download, and guess what... 480KB/s again, downloaded a 5 meg file in about 12 seconds.
What I have tried:
Forcing the LAN to 100Meg full duplex
Firmware upgrade on the router
Reset router to factory defaults
Rebooted pc, router and modem at the same time.
Use a static IP with correct settings (same speed)
Use DHCP through the router
Connected directly to the cable modem and use DHCP (works fine)
PC windows xp SP2 fully patched.
No software firewalls. (at any time)
Disabling UPNP on the router
Turned flow control off on the LAN adapter (shouldnt be on in the first place, thats half duplex >.)
I cant see why my computer downloads from blueyonder fine with no speed issues at all, and yet any other website, I get extremely poor performance. This router has been working fine for about a month now, just needed a few reboots once in a while, but which router doesnt. My upload speeds seem pretty constant, and dont seem to vary regardless of router or not. Seems like inbound traffic is getting jammed.
Anyone able to shed some thought? Sorry for the wall of text, just thought I would let you know everything on the first post instead of having to reply a dozen times.

try TCP Optimiser .. This should adjust the MTU settings of the NIC on the PC ...

Poor BB Speed - possible faulty cabling?

Hi Everyone,
I moved house 2 months ago and have had BB speed issues since moving - best speed between 200 and 500 kbps.
I live about 150 to 200 metres from the exchange, on the same road and can see it from by bedroom window - BT's website states an approximation on the speed of 21Mbps, some difference!!
My ISP won't pass the issue to Openreach as they state my BB connection is stable - they don't seem concerned about the speed, and I know if I report a line fault myself I am going to be charged £££ as the phone line is working ok.
I have already replaced the bottom half of my (very old and very yellow) NTE with an adsl filter one - BT fitted one of these in our previous house, that has made no difference, nor did removing the internal extensions and connecting the modem/router via a dangly filter to the test socket - I left it like this for a week.
I have been doing some investigations and the cable to our house from the pole (there is no green box on the road between my house and the exchange) seems to be shared with our neighbour - it's hooked up to the wall of the house near the gutter where there is a small black box underneath - 2 cables come out of this, one of them ours. Our cable is visually much older than the other neighbours - the neighbours cable is black and seems to be the same type of cable coming across from the pole, our cable is brittle and light grey and has 2 halfs, like very cheap bell or speaker wire (certinally not twisted pair by any imagination!) and runs right alongside the mains power coming into the house - both cables are running alongside each other for about 5 metres. This cable then comes down to the front door, and in behind the door fram - behind the door inside there is a very old looking bt connection box - brown in colour and oval in shape - in here is a rats nest of cables and what look like screw connectors and fuses!?! - the cable then leaves this (on much newer looking cable) along a short run of the skirting before going into the NTE in the kitchen, the modem/router is connected direct into the NTE (on the adsl port obviously!)
I am convinced that it's this poor cable and the old joint box that is causing the issues? - How would I go about getting BT/Openreach to replace this if my ISP will not report it to them, and my phone line (for voice) is working?

'the cable to our house from the pole (there is no green box on the road between my house and the exchange) seems to be shared with our neighbour'
The cable from the pole to the property will either by a drop wire 10b, which has two pairs in it, i.e. enough wires for two line or a CAD55 cable, which is a four pair (4 lines).
'our cable is brittle and light grey and has 2 halfs, like very cheap bell or speaker wire'
That sounds like a drop wire 6, 6 as in its from the 1960's. Actually its not called drop wire 6 because of that but it would have been there since the late 60's or early 70's.
Anyhow, the only people who can replace that are Openreach and they have a policy of; 'if it ain't broke don't fix it'.

USB connectivity issues

I recently bought a 20GB 4G iPod from a friend, who had bought it originally off of ebay atleast a year ago so all I have is the ipod itself and a usb cable.
Everything on it works fine, all of the music previously put on works fine, as do pictures, etc. But when I went to go add and delete files off of the ipod I got the "USB Device Not Recognized" balloon popup in XP. After going through these forums and numerous others I haven't been able to accomplish anything. I've tried the 5R's (except for restore as I haven't been able to get the ipod connected in any way to this computer).
I have another computer downstairs which is a few years older, about 5 years old but which has XP installed aswell, so I figured I might try and see if I could get anything to work on that.I tried to plug the ipod into just to see if something would work, and it showed up in My Computer right away before I had iTunes installed. I did, however get an error about the usb ports not being high speed, I'm assuming they're USB1.1 giving the computer's age, but it worked nevertheless. I got the ipod to charge, it to be accessible from iTunes, and to show up in Windows Explorer without a hitch.
After having it fully charged I tried once again to hook the ipod up to any usb port with no avail. I checked both computers' properties and found both have 500 mA to each USB port, so I would assume the USB 2.0 ports would have a better chance of working than the 1.1?
Any help is greatly appreciated, let me know if you need more information, thanks!

This may sound really strange, but if your computer has a FireWire connection, try using that instead. I recently bought a new computer (HP w/Windows XP) and had all sorts of USB connection issues.
USB Device Not Recognized
iPod needs to be restored
Cannot Read USB Storage Device
Finally fed up, I tried the FireWire ports on the computer and it worked not problem. iTunes popped right up and started updating.
HP Windows XP
HP Windows XP

Speed Issues

Greetings and Salutations,
I'm having speed issues with my Adobe AIR application. From what I've read on the web, AIR is supposed to be fast at drawing graphics. I am writing an application which has multiple screens. On one of the screens I have a tab (SuperNavigator) which has a canvas on it. That canvas has a series of other canvases (built with a repeater) that have graphics in them. I am having speed issues when I have more than 50 of these children canvases. I've tried running it without the graphics (code below is without the graphics) to see how it performs. When I have 954 of these canvases being drawn it takes about 2.5 minutes to draw. This is unacceptable and I'm wondering if this is something I've induced or if AIR was never meant to handle such a large amount of canvases (actually this isn't a large amount, in a real world environment there could be a lot more). I've included relevant clips from the code. There are a couple empty boxes that in the real application will hold graphics.
The class withing the Tab Navigator is a canvas.
In the action Script (the setter line takes 2.5 minutes to get past) (it's binding to the repeater that seems to be my problem).
[Bindable] private
private var _assetList:Array;
[Bindable]
public function get timelineAssetList():Array{
     return this._assetList;
public function set timelineAssetList(ac:Array):void{
     this._assetList = ac;
The MXML code that is being bound to:
<mx:Canvas id="labelCanvas" left="0" right="0" top="0" height="65" verticalScrollPolicy="off" scroll="scrolling(event)">
      <mx:HBox horizontalGap="1" left="10" right="10" top="10">
          <mx:Spacer width="2"/>
            <mx:Canvas width="{getHeaderWidth()}" height="40" borderStyle="solid" borderColor="{StaticVariables.borderColor.getColorUint()}" horizontalCenter="0">
            <PastDataView:ColorBarScale id="scale" bottom="10"/>
     </mx:Canvas>
          <mx:Canvas width="20" height="40">
               <mx:Spacer width="20" />
          </mx:Canvas>
     </mx:HBox>
</mx:Canvas>
<mx:Canvas id="assetCanvas" left="0" right="0" bottom="0" top="65" scroll="scrolling(event)">
     <mx:VBox y="10" right="16" left="10" verticalGap="0">
          <mx:Repeater id="assetRepeater" dataProvider="{timelineAssetList}">
               <mx:HRule width="100%"/>
               <PastDataView:ColorBarBar id="barArray" width="100%" height="170" asset="{assetRepeater.currentItem}"/>
          </mx:Repeater>
     </mx:VBox>
</mx:Canvas>
The ColorBarBar consists of:
<?xml version="1.0" encoding="utf-8"?><mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="300" xmlns:PastDataView="org.XXXXXX.CenterScreen.PastDataView.*" horizontalScrollPolicy="off" click="clicked()">
     [Bindable]
     public static var _colorBarHeight:int = StaticVariables.colorBarHeight;
     [Bindable]
     private var _asset:Object;
     [Bindable]
     public function set asset(a:Object):void{
          this._asset = a;          getBackgroundColor();
     public function get asset():Object{
          return _asset;     }
      private function getBackgroundColor():void {
          var color:String = asset.color;
          if (color == null) color = "Black";
          if( color.toLowerCase() == "blue" ) {
               lblAssetTag.setStyle("color", 0x1674cc);               lblAsset.setStyle(
"color", 0x1674cc);          }
else if( color.toLowerCase() == "red" ) {
               lblAssetTag.setStyle("color", 0xe35353);               lblAsset.setStyle(
"color", 0xe35353);          }
else if(color.toLowerCase() == "grey" || color.toLowerCase() == "gray") {               lblAssetTag.setStyle(
"color", 0xe55555);               lblAsset.setStyle(
"color", 0xe55555);          }
else { // give it a default color                lblAssetTag.setStyle(
"color", 0x000000);               lblAsset.setStyle(
"color", 0x000000);          }
      private function calculateActivityRepeaterHeight():int{
          return this.height-50-_colorBarHeight;     }
      public function clicked():void{
          dispatchEvent(new SelectAssetEvent(this._asset, false, false, true));     }
     ]]>     </mx:Script>
       <mx:VBox left="0" top="0" right="0">
           <mx:Spacer height="1"/>
           <mx:HBox>
                <mx:Spacer width="2"/>               <mx:Label id="lblAssetTag" text="{asset.type}: " fontWeight="bold" fontSize="12" doubleClickEnabled="true" doubleClick="titleClicked()"/> id="lblAssetTag" text="{asset.type}: " fontWeight="bold" fontSize="12" doubleClickEnabled="true" doubleClick="titleClicked()"/> id="lblAssetTag" text="{asset.type}: " fontWeight="bold" fontSize="12" doubleClickEnabled="true" doubleClick="titleClicked()"/>
               <mx:Label id="lblAsset" text="{asset.name}" fontSize="12" doubleClickEnabled="true" doubleClick="titleClicked()"/>
                <mx:Label id="lblAssetId" text="{'(' + asset.id + ')'}" fontSize="12" visible="{mx.core.Application.application.debugMode}"/>
           </mx:HBox>
          <mx:HBox horizontalGap="1">
                <mx:Spacer width="2"/>
                <mx:Spacer width="10" />
                <mx:VBox width="100%">                    <mx:VBox>
                    </mx:VBox>
                    <mx:VBox id="displays" verticalScrollPolicy="auto" height="{calculateActivityRepeaterHeight()}" horizontalScrollPolicy="off">
                    </mx:VBox>
               </mx:VBox>
          </mx:HBox>
          <mx:Spacer height="2"/>
      </mx:VBox></mx:Canvas>
I would appreciate any thoughts or feedback you could provide.
~martin

The Canvas is a very heavy object that has lots of overhead. Even worse is the VBox object that is in there multiple times.
What exactally are you trying to accomplish? Just looking over the code, it seems that the same could be done directly with the Graphics API, at a much faster rate.
For each of the VBoxes and Canvases you have, the entire size of each child and parent need to be re-evalulated each time you add or change something. This is a HUGE overhead, and probably why the app is running so slow. You may need to convert this app to use simpler objects (UIComponent or something lower-level like that) to get any speed.
Are you using Flex Bulder? Take a look at the app while the Profiler is running to see what I'm talking about.

Speed Issues Fixed In 9.1.2

Lost all my thumbnails updating to iPhoto 9.1.2 but rebuilding the thumbnail database solved the problem. Best of all, the speed issues are finally gone in iPhoto 9.1.2. Opening the application is way faster again (2 seconds as opposed to 12 seconds or more). Scrolling is way faster again. Can't believe it took this long for Apple to fix this mess. Nevertheless, iPhoto '11 feels like iPhoto '09 once again. Thanks Apple.

Lost all my thumbnails updating to iPhoto 9.1.2 but rebuilding the thumbnail database solved the problem. Best of all, the speed issues are finally gone in iPhoto 9.1.2. Opening the application is way faster again (2 seconds as opposed to 12 seconds or more). Scrolling is way faster again. Can't believe it took this long for Apple to fix this mess. Nevertheless, iPhoto '11 feels like iPhoto '09 once again. Thanks Apple.

Iteration Speed issue when Indexing 3D array wried to a while-loop

Brief Description of my Program:
I am working on the real-time signal generation by using LabView and DAQmx (PCI-6110 card). My vi reads the big data file (typically 8MB txt file containing about 400,000 samples (complex double precision). Then, the signal is pre-processed and I end up with a huge 3D array to feed while-loop (typically 3D array dimension is N x 7 x M where N & M >> 7). Inside the loop, that 3D array is indexed and processed before the results are written to the DAQmx outputs. I have a speed issue when indexing the large 3D array (i.e, 3D array having a large sub-array size). My while-loop could not run fast enough to top-up the DAQmx AO buffer (at the output rate of 96kHz). It could run faster only if I use smaller 3D array (i.e, smaller-sized sub-arrays). I do not quite understand why the size of 3D sub-array affects the rate of looping although I am indexing same sub-array size at each iteration. I really appreciate your comments, advices and helps.
I include my 3D array format as a picture below.
Question on LabView:
How does indexing an 3D array which wires to the while-loop affect the speed of the loop iteration? I found that large dimension of sub-arrays in the 3D array slows down the iteration speed by comparing to indexing the same size of sub-array from smaller-sized sub-arrays of the 3D array to perform signal processing inside the while-loop. Why? Is there any other way of designing LabView Program to improve speed of iteration?
attachment:

Thank you all for your prompt replies and your interests. I am sorry about my attachment. But, I have now attached a jpg format image file as you suggested.
I had read the few papers on large data handling such as "LabVIEW Performance and Memory Management". Thus, I had already tried to avoid making unnecessary copies of data and growing arrays in my while-loop. I am not an expert on LabView, so I am not sure if the issues I have are just LabView fundamental limitations or there are any other ways to improve the iteration speed without reducing the input file size and DAQ output rate.
As you request, I also attach my top-level vi showing essential sections such as while-loop and its indexing. The attached file is as an image jpg format because the actual vi including Sub-VIs are as big as 3MB in total. I hope my attachment would be useful for anyone who would like to reply my question. If anyone would like to see my whole vi & llb files, I would be interesting to send it to you by an e-mail privately and thus please provide your e-mail address.
The dimension of my 3D array is N x 7 x M (Page x Row x Column), where N represents number of pages in 3D array, and M represents the size of 1D array. The file I am currently using forms 3D array of N = 28, & M = 10,731. Refering to the top-level vi picture I attached, my while-loop indexes each page per iteration and wrap-around. The sub-VI called "channel" inside the while-loop will further index its input (2D array) into seven of 1D arrays for other signal processsing. The output from that "channel" sub-VI is the superposition of those seven arrays. I hope my explaination is clear.
Attachement: 3Darray.jpg and MyVi.jpg
Kind Regards,
Shein
Attachments:
3Darray.jpg ‏30 KB
MyVI.jpg ‏87 KB

Home Hub 3 Speed Issue

Some 6 weeks ago I had an issue with losing my internet connection completly, and eventually after a long session with the help desk I magaged to reconnect using the direct port on the main phone socket. However since then I have had a speed issue and Ive been only getting speeds in the order of 2.3Mb.
However running the BT speed test tells me that the connection to my Home Hub 3 is running at 8.13Mb, but the connection to my computer is running at 2.18Mb.
I have tried every thing I can think of. Followed all the advice to improve the connection but nothing works. Reseting the Home Hub, reseting the factory defaults. I've closed down every program running in the background, disconnected the rest of the hardwired network, fitted a new shorter cat 6 cable. All to no avail. The speed still stays firmly at 2.18 to 2.15. down and 0.37 up.
Could their be a fault with my Home Hub?
Thaks for any advice.
Roy
Solved!
Go to Solution.

23:38:00, 29 Jul.
( 5932.320000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:37:29, 29 Jul.
( 5901.890000) CWMP: session closed due to error: No response
23:37:28, 29 Jul.
( 5900.920000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:37:28, 29 Jul.
( 5900.910000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:37:28, 29 Jul.
( 5900.480000) CWMP: Initializing transaction for event code 4 VALUE CHANGE
23:37:24, 29 Jul.
( 5896.840000) DSL is down after 2 minutes uptime
23:37:24, 29 Jul.
( 5896.840000) ETHoA is down after 2 minutes uptime
23:37:24, 29 Jul.
( 5896.200000) PPPoA is down after 2 minutes uptime [Waiting for Underlying Connection (WAN DSL - Up)]
23:37:20, 29 Jul.
( 5892.820000) PPP LCP Send Termination Request [User request]
23:36:35, 29 Jul.
( 5847.820000) CWMP: session completed successfully
23:36:34, 29 Jul.
( 5846.940000) CWMP: HTTP authentication success from https://pbthdm.bt.mo
23:36:32, 29 Jul.
IN: BLOCK [16] Remote administration (TCP [116.10.191.167]:6000->[81.154.29.9]:22 on ppp0)
23:36:32, 29 Jul.
( 5844.670000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:36:32, 29 Jul.
( 5844.660000) CWMP: Session start now. Event code(s): '6 CONNECTION REQUEST,4 VALUE CHANGE'
23:36:32, 29 Jul.
( 5844.050000) CWMP: Initializing transaction for event code 6 CONNECTION REQUEST
23:35:08, 29 Jul.
( 5760.150000) CWMP: session completed successfully
23:35:07, 29 Jul.
( 5759.850000) CWMP: HTTP authentication success from https://pbthdm.bt.mo
23:34:55, 29 Jul.
( 5746.980000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:34:55, 29 Jul.
( 5746.970000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:34:48, 29 Jul.
( 5740.780000) PPP IPCP Receive Configuration ACK
23:34:48, 29 Jul.
( 5740.580000) PPP IPCP Send Configuration ACK
23:34:48, 29 Jul.
( 5740.580000) PPP IPCP Receive Configuration Request
23:34:48, 29 Jul.
( 5740.290000) PPP IPCP Send Configuration Request
23:34:48, 29 Jul.
( 5740.290000) PPP IPCP Receive Configuration NAK
23:34:47, 29 Jul.
( 5739.870000) PPP IPCP Send Configuration ACK
23:34:47, 29 Jul.
( 5739.870000) PPP IPCP Receive Configuration Request
23:34:47, 29 Jul.
( 5738.990000) PPP IPCP Send Configuration ACK
23:34:47, 29 Jul.
( 5738.990000) PPP IPCP Receive Configuration Request
23:34:45, 29 Jul.
( 5737.420000) PPP IPCP Send Configuration Request
23:34:45, 29 Jul.
( 5737.410000) WAN operating mode is DSL
23:34:45, 29 Jul.
( 5737.410000) Last WAN operating mode was DSL
23:34:43, 29 Jul.
( 5735.310000) PPPoA is up - VPI: 0, VCI:38
23:34:43, 29 Jul.
( 5735.290000) CHAP authentication successful
23:34:43, 29 Jul.
( 5735.260000) CHAP Receive Challenge
23:34:43, 29 Jul.
( 5735.250000) Starting CHAP authentication with peer
23:34:43, 29 Jul.
( 5735.250000) PPP LCP Receive Configuration ACK
23:34:43, 29 Jul.
( 5735.240000) PPP LCP Send Configuration Request
23:34:42, 29 Jul.
( 5734.110000) PPP LCP Send Configuration ACK
23:34:42, 29 Jul.
( 5734.110000) PPP LCP Receive Configuration Request
23:34:40, 29 Jul.
( 5732.210000) PPP LCP Send Configuration ACK
23:34:40, 29 Jul.
( 5732.210000) PPP LCP Receive Configuration Request
23:34:40, 29 Jul.
( 5732.090000) PPP LCP Send Configuration Request
23:34:37, 29 Jul.
( 5729.230000) ETHoA is up - VPI: 0, VCI:35
23:34:37, 29 Jul.
( 5729.230000) DSL is up
23:34:36, 29 Jul.
( 5728.350000) DSL noise margin: 21.00 dB upstream, 10.90 dB downstream
23:34:36, 29 Jul.
( 5728.280000) DSL line rate: 448 Kbps upstream, 8128 Kbps downstream
23:34:12, 29 Jul.
( 5704.670000) CWMP: session closed due to error: No response
23:34:12, 29 Jul.
( 5704.640000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:34:12, 29 Jul.
( 5704.630000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:33:42, 29 Jul.
( 5674.150000) CWMP: session closed due to error: No response
23:33:41, 29 Jul.
( 5673.000000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:33:41, 29 Jul.
( 5672.990000) CWMP: Session start now. Event code(s): '4 VALUE CHANGE'
23:33:40, 29 Jul.
( 5672.560000) CWMP: Initializing transaction for event code 4 VALUE CHANGE
23:33:36, 29 Jul.
( 5668.110000) DSL is down after 92 minutes uptime
23:33:36, 29 Jul.
( 5668.100000) ETHoA is down after 92 minutes uptime
23:33:35, 29 Jul.
( 5667.670000) PPPoA is down after 92 minutes uptime [Waiting for Underlying Connection (WAN DSL - Up)]
23:33:32, 29 Jul.
( 5664.200000) PPP LCP Send Termination Request [User request]
23:29:51, 29 Jul.
OUT: BLOCK [7] ICMP replay (ICMP type 3 code 1 81.153.31.203->69.171.248.65 on ppp0)
23:28:50, 29 Jul.
( 5382.020000) CWMP: session completed successfully
23:28:48, 29 Jul.
( 5380.950000) CWMP: HTTP authentication success from https://pbthdm.bt.mo
23:28:46, 29 Jul.
( 5378.860000) CWMP: Server URL: https://pbthdm.bt.mo; Connecting as user: ACS username
23:28:46, 29 Jul.
( 5378.850000) CWMP: Session start now. Event code(s): '6 CONNECTION REQUEST,4 VALUE CHANGE'
23:28:46, 29 Jul.
( 5378.230000) CWMP: Initializing transaction for event code 6 CONNECTION REQUEST
23:26:03, 29 Jul.
( 5215.090000) CWMP: session completed successfully
23:26:02, 29 Jul.
This is some of the event log.

Windows 7 64bit speed issues

Hi,
Our company have been purchasing iMacs for the past 4-5 years and installing Windows XP without any problems. Last year we started installing Windows 7 64 bit onto, the then current, leopard model without any issues.
We have recently purchased a whole batch of i5 iMacs with lion installed. I have installed Windows 7 64 bit without any problems but have started noticing huge slowdown with what seems to be hard drive access o every single machine. Even a single one we purchased when they first came out.
Using Perfmon I cant see any stress on the CPU, GFX card or RAM but there seems to be something odd with the hard drive access. I have stripped Windows 7 down to its bare minimum services removing Aero, themes, and all non essential services but still the speed issues occur.
I have messed around with the pagefile size, indexing, etc, but nothing is having any impact.
For example, when I save a simple spreadsheet the saving window appears in Windows 7 with the spinning circle for around 30 seconds. This is a tiny file, why is it taking so long. Its virtually instant if done on a Windows XP bootcamp machine or even in Windows 7 on an older Leopard iMac.
There really isnt a great deal regarding this problem oin the internet but it has occurred on all the new i5 Lion iMacs we have.
Does anyone have any other suggestions (serious ones ) that I could try?
I am currently installing the 32 bit version to see if it is a driver issue.
Cheers

isn't apple now using propritary drive firmware in 2011 imac?
I suspect 30 sec is drive delay spinup and is frequently happens with green drives, I have some and do this. swap for WD black or something.
www.hardmac.com talks about imac drives

Facing speed issue in my iphone 4, 16gb

Hi Guys
I am facing speed issue in my iphone 4, 16gb. may after updating ios 7, currenly i am using 7.0.4 update.
please help me if anyone have soltion.
Regards
Parveen

Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new). Try each of these in order until the issue is resolved.
The iPhone4 runs iOS7 without any issues or performance problems.
Apple does not provide a method to downgrade the iOS on any iDevice. Discussion of such matters in these forums is against the terms of use.

USB Speed

First off, I am disappointed that the new iPod I have been waiting for (video and photo and music) no longer supports FIREWIRE. I use a lot of firewire disks, audio interface, and have a nice hub... but if I decide to obtain a new iPod I now have to examine my USB speed.
When you use the profiler tool and look at the USB tree on my 1.25GHz G4 iMac, you see three separate USB devices - two are 12 MBs and one iw 480 MBs - The keyboard and printer are on the slower ports, and I have a SanDisk reader apparently on the faster port.
Is that the case that not all of the USB connections are high-speed USB? Should I be expecting that at least one USB connection on this computer will be a high speed USB?
Thanks

All three of the USB ports on your computer are USB 2.0; the keyboard as well as any USB devices plugged in to the keyboard will operate at USB 1.1 speed. The printer may also operate at USB 1.1 speeds.
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