Re: [flexcoders] Re: performance issues

Fri, 28 Jul 2006 10:02:22 -0700

 
Here is what I see. I can not max out CPU on either desktop(3.0GHz Intel) or multimedia laptop(1.7GHz Intel) - both in 1600x1200 mode. I can easily do it on business notebook(2.0GHz).
I moved default-frame-rate to 99 - effects are minimal to my eye, for about 10%-15% of the CPU load increase.
 
Can you identify the bottleneck resource in your case as it might help to identify the problem or technique that needs to be tweaked
 
As far as "being choppy" flex scrolling is based on large scrolling unit - row rather then pixel . As long as you do not have layout/backgrounds/color the changes are not perceived as drastic. Backgrounds + colors + layouts bring that up - it is not transitioning on pixel level
 
I will see if I can put cost management per frame in the makeRowsAndColumns method to provide smoother response times.
 
Thank you,
Anatole
 


 
On 7/28/06, judah <[EMAIL PROTECTED]> wrote:

I'd like to add a "me too" to the performance thing. If there is one thing I'd like to worked on it would be optimizing the code. On the first example it is a little bit sluggish. On the second and third example start to get choppy. When I say choppy I mean it freezes for a split second. I can record a video of it if needed. On some other flex 2 apps I've noticed some slow down or choppiness in transitions. Not all of them. It's odd because any Flash 8 site runs smoothly.

I am using a 4yr old pc with a brand new video card. I know its "old" but I can run any program fine (photoshop, flash, flex, i get slow down in notepad -jk) so I've never felt the need to upgrade.
AMD Athlon 2400, 1GB Ram, NVidia Geforce 6600

Judah



Anatole Tartakovsky wrote:
 
should be
http://flexblog.faratasystems.com/performance/grid_performance.html   - no customization - pure UITextField default renderer
http://flexblog.faratasystems.com/performance/grid_performance2.html  - run-time styles, formatting and computed expressions
 
Chances are that it is more video card issue - as a matter of fact, I can reduce performance 3-4 times on the same machine using VMWare as it uses CPU for emulation of some GDI calls.


 
On 7/28/06, bhaq1972 < [EMAIL PROTECTED]> wrote:

i tried your links out (btw the first 2 are pointing to the same
example). on my normal development machine (6 months old with all
the trimmings) performance is very quick as expected.

but when i tried it from an old laptop (4-5 years old) it felt like
one of my flex 1.5 datagrids....very slow and sluggish scrolling.

made me appreciate how much of a good job adobe did in flex2.

regards
bod

--- In [email protected], "Anatole Tartakovsky"


<[EMAIL PROTECTED]> wrote:
>
> How is the performance on your machine of the samples in my
links ? - trying
> to isolate player/setStyle performance from application code
efficiency.
> Thank you,
> Anatole
>
>
>
> On 7/28/06, Pan Troglodytes <[EMAIL PROTECTED]> wrote:
> >
> > For reference, my testing was done on a dual core athlon 64
4400 with a
> > geforce 7800 gt and 2 gigs of ram. Hardware is not a limiting
factor.
> >
> > On 7/28/06, Anatole Tartakovsky <[EMAIL PROTECTED]> wrote:
> >
> > > Matt,
> > > I placed typical business case to show the performance issues
based on
> > > hardware used:
> > >
> > > case 1 : basic

> > > case 2: basic grid with typical

> > > case 3: typical usage of formatting and
styling< http://flexblog.faratasystems.com/performance/grid_performanc
e.html>- IMPLEMENTED VIA RUN-TIME CSS AND COMPUTED EXPRESSIONS - very

> > > straightforward code
> > >
> > > While performance is reasonable on midrange 2 year old PC, my
business
> > > laptop is very sluggish , however multimedia one with good
graphics chip and
> > > slower CPU works faster then PC.
> > >
> > > Here is the source for the business case:
> > >
> > > <?xml version="1.0" encoding="utf-8"?>
> > > <mx:Application xmlns:mx=" http://www.adobe.com/2006/mxml "
> > > xmlns="*" layout="vertical"
> > > xmlns:lib="com.theriabook.controls.*"
> > > viewSourceURL="srcview/index.html">
> > > <mx:Style>
> > > .dgHeaderStyle {
> > > textAlign:center;
> > > fontWeight : bold;
> > > backgroundAlpha:.5;
> > > }
> > > </mx:Style>
> > > <mx:Script>
> > > <![CDATA[
> > > include "Employees.inc";
> > > private function salaryColor(item:*):int{ return
item.SALARY
> > > <50000?0xff0000:0x0000ff;}
> > > ]]>
> > > </mx:Script>
> > > <lib:DataGridEx id="a" width="100%" height="100%"
> > > headerStyleName="dgHeaderStyle"
> > > dataProvider="{getEmployees()}">
> > > <lib:columns>
> > > <mx:Array>
> > > <mx:DataGridColumn dataField="EMP_LNAME" />
> > > <mx:DataGridColumn dataField="EMP_FNAME" />
> > > <lib:DataGridColumnEx
> > > dataField="DEPT_ID"
> > >
props="{{&apos;resource&apos;:&apos;employee&apos;,&apos;keyColumn&ap
os;:&apos;dept_id&apos;,&apos;autoFill&apos;:&apos;true&apos;}}"/>
> > >
> > > <lib:DataGridColumnEx dataField="PHONE"
> > > formatString="phone" />
> > > <lib:DataGridColumnEx
dataField="BENE_DAY_CARE"
> > > itemRenderer="
com.theriabook.controls.CheckBox"
> > > rendererIsEditor="true"
editorDataField="value"
> > > textAlign="center" paddingLeft="5"
> > >
> > >
expando="{{&apos;onValue&apos;:&apos;Y&apos;,&apos;offValue&apos;:&ap
os;N&apos;}}"
> > > />
> > > <lib:DataGridColumnEx dataField="SS_NUMBER"
> > > formatString="ssn" />
> > > <lib:DataGridColumnEx dataField="SALARY"
> > > formatString="currency"
> > >
> > >
styles="{{&apos;color&apos;:salaryColor,&apos;fontWeight&apos;:functi
on
> > > (item:*):String{ return item.SALARY > 50000?{ return
item.SALARY >
> > > 50000?&apos;bold&apos;:&apos;normal&apos;} }}"
> > > />
> > > <lib:DataGridColumnEx dataField="SALARY"
> > > formatString="currency" editable="true" >
> > > <lib:styles>
> > > <mx:Object
backgroundColor="{salaryColor}"
> > > backgroundAlpha=".3"/>
> > > </lib:styles>
> > > </lib:DataGridColumnEx>
> > > <lib:DataGridColumnEx dataField="START_DATE"
> > > formatString="shortdate"/>
> > >
> > > <!--lib:DataGridColumnEx dataField="BONUS"
> > > formatString="currency"
> > >
> > > computedFields="{{&apos;BONUS&apos;:function( data:*):Number {
return
> > > data.SALARY*.1;}}}"
> > > /-->
> > > </mx:Array>
> > > </lib:columns>
> > > </lib:DataGridEx>
> > > </mx:Application>
> > >
> > >
> > >
> > >
> > >
> > >
> > > On 7/21/06, Matt Chotin <[EMAIL PROTECTED]> wrote:
> > > >
> > > > Well DataGrid scrolling performance is something that
we've spent
> > > > a lot of time tuning so I would love for us to get a full
test case that we
> > > > can look at. I saw in the thread you linked mentioning a
1600x1200 monitor,
> > > > is the DataGrid taking up most of that real estate? The
more visible rows
> > > > the slower the scrolling will be. Another thing you could
look at is in
> > > > your setter for the data comparing against the old value and
if it hasn't
> > > > changed not doing anything, it may be that it's invalidating
too often?
> > > > I'll ask one of the people who worked on performance if she
has any
> > > > thoughts.
> > > >
> > > >
> > > >
> > > > Matt
> > > >
> > > >
> > > > ------------------------------
> > > >
> > > > *From:* [email protected]
[mailto: [email protected] ]
> > > > *On Behalf Of *Pan Troglodytes
> > > > *Sent:* Wednesday, July 19, 2006 11:44 PM
> > > > *To: [EMAIL PROTECTED]
> > > > *Subject:* [flexcoders] performance issues
> > > >
> > > >
> > > >
> > > > Well, specifically I had a DataGrid using this for the
itemRenderer:
> > > >
> > > > package nes {
> > > >
> > > > import mx.controls.dataGridClasses.DataGridListData ;
> > > > import mx.controls.Label ;
> > > >
> > > > public class SignColorItemRenderer extends Label {
> > > > public var negativeColor:uint = 0xFF0000;
> > > > public var positiveColor:uint = 0x008000;
> > > > public var zeroColor:uint;
> > > >
> > > > override public function set data(value:Object):void {
> > > > super.data = "">> > > >
> > > > var n:Number = data[DataGridListData
(listData).dataField];
> > > > if (n < 0)
> > > > setStyle("color", negativeColor);
> > > > else if (n > 0)
> > > > setStyle("color", positiveColor);
> > > > else if (n == 0)
> > > > setStyle("color", zeroColor);
> > > > }
> > > > }
> > > > }
> > > >
> > > > I brought it up in this thread:
> > > >
> > > >
http://groups.yahoo.com/group/flexcoders/message/43243;_ylc=X3oDMTM3c
WM2MG9mBF9TAzk3MzU5NzE0BGdycElkAzEyMjg2MTY3BGdycHNwSWQDMTYwMDAwNzIwNw
Rtc2dJZAM0MzI2MwRzZWMDZnRyBHNsawN2dHBjBHN0aW1lAzExNTI4NTY4NDUEdHBjSWQ
DNDMyNDM-
> > > >
> > > > I tried LOADS of different ways to do it. I found that
anytime I put
> > > > much of any extra code in, it took away from the
responsiveness. Even
> > > > replacing the above data procedure with just a single
setStyle statement.
> > > > As I said, it's not horrible. But I definitely notice it.
> > > >
> > > > The other main thing I can point out is some sluggishness
when
> > > > resizing the browser window and having it resize/relayout
the Flex app. But
> > > > it's hard to tell how much of that is the browser and how
much is Flex.
> > > >
> > > > On 7/20/06, *Matt Chotin* < [EMAIL PROTECTED] > wrote:
> > > >
> > > > Can you provide a little more detail on the performance
areas that are
> > > > hurting you? If there's a sample that demonstrates the
speed issue it may
> > > > be something we can look at.
> > > >
> > > >
> > > >
> > > > Matt
> > > >
> > > >
> > > > ------------------------------
> > > >
> > > > *From:* [email protected] [mailto:
[email protected]
> > > > ] *On Behalf Of *Pan Troglodytes
> > > > *Sent:* Wednesday, July 19, 2006 10:49 PM
> > > > *To:* [email protected]
> > > > *Subject:* Re: [flexcoders] So? What are folks here actually
> > > > building...?
> > > >
> > > >
> > > >
> > > > Well, since I have never programmed in ActionScript at all,
my
> > > > projects have served a dual purpose - functional and
educational. In other
> > > > words, some of the software may never see the light of day
but that's okay -
> > > > at least it taught me how to build in Flex.
> > > >
> > > > My most "real" application has been an ad-hoc query
builder. We have
> > > > some financial reporting that it broken down into various
fields: branch,
> > > > quarter, period, that kind of thing. So I gave each field
an accordion pane
> > > > and filled it with the values for that field. Then I let
the user
> > > > drag-n-drop the values for each field into another List,
arranging them
> > > > hierarchically however they want. This then feeds a sql
statement that uses
> > > > group by and rollup to get all the data both on the detail
level and
> > > > summarized by each parent level.
> > > >
> > > > I then feed that into a DataGrid that has many custom
renderers. The
> > > > main powerhouse is the "tree" renderer. Basically, the
first column down
> > > > the page looks like a tree of those key fields. So if they
chose to report
> > > > by quarter, then branch, then manager, it would look like:
> > > >
> > > > (view the following in a fixed width font)
> > > > Gross Expenses Profit
> > > > Total X X X
> > > > 1Q-2006 X X X
> > > > Branch 1 X X X
> > > > Jane Doe X X X
> > > > John Smith X X X
> > > > Branch 2 X X X
> > > > Phil Johnson X X X
> > > > 2Q-2006 X X X
> > > > Branch 1 X X X
> > > > Jane Doe X X X
> > > > John Smith X X X
> > > > Branch 2 X X X
> > > > Phil Johnson X X X
> > > >
> > > > I put in Xs because I got tired of making up stuff. But you
get the
> > > > picture. It's basically very pivot-table-ish. It's really
the graphical
> > > > touches that seal the deal. There's icons and animations
and colors all
> > > > over the place. Not too much, but more than I could have
coded in the week
> > > > or so I've been building it. I'm an experienced Delphi user
and have to say
> > > > I'm really blown away by Flex. Delphi is RAD but Flex is
RAD^2.
> > > >
> > > > Okay, for my VERY basic advice on what I would put some
effort into.
> > > > Well, first, fix the bugs that have come out here. You have
a pretty wide
> > > > base of components already and I would like them to be very
stable. Nothing
> > > > slows a developer down more than spending hours on a problem
to only find
> > > > the bug isn't in his/her code.
> > > >
> > > > Second, I would REALLY like to see some optimization done.
I know
> > > > this is going to be hard with the dynamic, frequently
untyped nature of
> > > > Flex. But some of the code runs painfully slow for what it
does. I'm still
> > > > not 100% happy with the speed of those custom itemRenderers
in the grid.
> > > > And I stripped them down as far as they can go and it's not
because I wrote
> > > > bad code. Overall, the speed is good for an "internet
application".
> > > > Internet apps get to make excuses. But I'd like to get the
speed good
> > > > enough to rival native desktop apps. Sure, not on
everything - but at least
> > > > on GUI graphics.
> > > >
> > > > Keep up the good work. I haven't had this much fun with a
new
> > > > language in a while...
> > > >
> > > > On 7/20/06, *David Mendels* < [EMAIL PROTECTED]> wrote:
> > > >
> > > >
> > > >
> > > > Hello,
> > > >
> > > >
> > > >
> > > > It has been less than a month since we shipped Flex, but I
know many
> > > > folks on this list had projects they started back in the
public beta time.
> > > > I know in many cases you may not be able to talk about what
projects you are
> > > > working on, but for those who can I'd love to get a view
onto what folks are
> > > > building. We spent a long time (almost two years) on all
the parts of the
> > > > Flex 2 product line (and the Flash Player 9) and it is very
cool to see the
> > > > traffic here, the emergence of third party conferences like
www.flexseminar.com
> > > > , the books coming out on Flex, the 60K plus downloads of
the IDE in
> > > > the public beta, but we'd love to get a sense of what real
applications
> > > > people are starting to build. The team is already working
on plans for
> > > > mid-term and longer term upgrades to Flex, and it helps us
to really
> > > > understand what people are building. So, if you are able to
talk about what
> > > > you are building please do share--I think it would be very
interesting for
> > > > the community and very valuable for us on the Flex team at
Adobe.
> > > >
> > > >
> > > >
> > > > --David
> > > >
> > > > Adobe
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Jason
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Jason
> > > >
> > > >
> > >
> >
> >
> > --
> > Jason
> >
> >
> >
>




-- 
"Always bear in mind that your own resolution to succeed is more important than any one thing."

"You can have anything you want - if you want it badly enough. You can be anything you want to be, do anything you set out to accomplish if you hold to that desire with singleness of purpose." 

- Abraham Lincoln


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