Poor performance horizontal List (TileLayout) with custom ItemRenderer containing a vertical Scroll

I'm having performance issues with a mobile application layout approach that consists of the following.
Pseudo code: (based on http://blogs.adobe.com/jasonsj/2011/11/mobile-list-paging-with-page-indicator-skin.html )
VIEW:
<View>
     <script>
          function getItemRenderer(data):IFactory {
               return new ClassFactory(data.itemClass);
     </script>
     <List id="pageList" width="100%" height="100% itemRendererFunction="getItemRenderer">
          <layout>
               <TileLayout numRows="1" width="pageList.width" height="pageList.height" />
          </layout>
     </List>
</View>
ItemRenderer example:
<Scrollerwidth="100%"
          height="100%">
     <VGroup>
              <s:Label fontWeight="bold" text="Name 1:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 2:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 3:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 4:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 5:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 6:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 7:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 8:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 9:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 10:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 11:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 12:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 13:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 14:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 15:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 16:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 17:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 18:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 19:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 20:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 21:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 22:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 23:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 24:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 25:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 26:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 27:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 28:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 29:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
               <s:Label fontWeight="bold" text="Name 30:" />
                     <s:HGroup paddingLeft="50" width="100%">
                     <s:TextInput width="100%" />
                </s:HGroup>
          </VGroup>
</Scroller>
Basically, I have a lot of input fields, eventually also date choosers, and textareas in each of those item renderers.
Is there a reason this is not performing well ?
Is there something I can do to improve the performance ?

Thanks for the hints.
Regarding TileLayout vs HorizontalLayout, I haven't seen much difference in performance.
But I did manage to make everything go faster **.
1st: not using the StageText on the TextInput's (changed that).
2nd: there was a font using CFF on the Label fields, which wasn't supported (changed that).
I'm not sure if those are what made the diff, but I'm happier!
**: Might be almost viable like this.
In all, I'm going to have about 7 custom item renderers in the List, but only 1 is visible at the time on screen (taking the whole visible area of the List). Some of the pages (i call them pages in such a case) will have some components that will be more elaborate, like permitting someone to do simple drawing within a region.
Yes, I'm imagining that the List component still will have them in memory and maybe recycle them if he's smart, thus making it heavy whenever it creates them. Would be interesting to see if I can optmize the creation of the itemrenderer instances. I'm still not that keen about using this approach of using a List to support such a user experience.
It would have loved it if the ViewNagivator could better support sliding between Views, but I understand it would require the ViewNavigator to know which View will be the next View, etc.. Maybe something like a ListNavigatorView or something like that
Details for now.
Regarding using a Edit mode, I'll keep that in mind and see if it makes sense in this app and how the user experience will be with such a mode.
Regarding using the HGroup for padding of the TextInput vs using a custom layout or custom component. You probably have a point. I'm kind of new to the Spark world, been using MX since Flex 2 and kind of got scared of the Spark world... No I'm diving head first. Thus, thanks for the hint on that. I'll digg and find some docs about the details on that!
Thanks again!

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You need an external Firewire drive to boot a PowerPC Mac computer.
I recommend you do a google search on any external harddrive you are looking at.
I bought a low cost external drive enclosure. When I started having trouble with it, I did a google search and found a lot of complaints about the drive enclosure. I ended up buying a new drive enclosure. On my second go around, I decided to buy a drive enclosure with a good history of working with Macs. The chip set seems to be the key ingredient. The Oxford line of chips seems to be good. I got the Oxford 911.
The latest the hard drive enclosures support the newer serial ata drives. The drive and closure that I list supports only older parallel ata.
Has everything interface:
FireWire 800/400 + USB2, + eSATA 'Quad Interface'
save a little money interface:
FireWire 400 + USB 2.0
This web page lists both external harddrive types. You may need to scroll to the right to see both.
http://eshop.macsales.com/shop/firewire/1394/USB/EliteAL/eSATAFW800_FW400USB
Here is an external hd enclosure.
http://eshop.macsales.com/item/Other%20World%20Computing/MEFW91UAL1K/
Here is what one contributor recommended:
http://discussions.apple.com/message.jspa?messageID=10452917#10452917
Folks in these Mac forums recommend LaCie, OWC or G-Tech.
Here is a list of recommended drives:
http://discussions.apple.com/thread.jspa?messageID=5564509#5564509
FireWire compared to USB. You will find that FireWire 400 is faster than USB 2.0 when used for a external harddrive connection.
http://en.wikipedia.org/wiki/UniversalSerial_Bus#USB_compared_toFireWire
http://www23.tomshardware.com/storageexternal.html

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