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Re: Performance degradation of CFX98 for plots


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Hi,

I just create a new project with two series and 5000 points each, the time

to plot the 10,000 points were 3 seconds with a 800MHZ, 128Ram.

It could be possible the code is producing the delay in your project, to

confirm I would suggest, just to check the speed, to create a new project

and feed the chart with a double loop from 0 to 1 and from 0 to 4999 with

ramdom data.

--

Regards,

Percy Dyer

Software FX, Inc. Tech Support

================================================

"Joao Ferreira" <nop25278@mail.telepac.pt> wrote in message

news:8lTkH9PZAHA.1692@sfxserver.softwarefx.com...

> Hi

>

> WinNT4SP5, Pentium III 300MHz 256 Mb RAM, Borland C++ builder V. 3.

>

> I am using ChartFX98 for plotting results from an ecosystem model we are

> developing. I have found that the plotting speed degrades as the plotting

> proceeds. For 5000 points, 2 series, in a trivial sample app we developed

to

> illustrate the problem, the time in miliseconds taken to plot the points

is

> (in 500 point batches):

>

> 5417

> 7761

> 9724

> 11616

> 12589

> 13950

> 15913

> 17715

> 18747

>

> Even if we turn off message processing in the app, so the points are only

> displayed at the end of the plot (which we do not want), the numbers are

> (for 10 series, each with 5000 points)

>

> 80

> 200

> 341

> 450

> 591

> 771

> 1032

> 1522

> 2323

>

> I am very worried about this, since we have invested a substantial amount

of

> time (and money) in ChartFX as the graphics solution for this application.

>

> I have taken the liberty of copying in a little code below.

>

> Many thanks for help/comments.

>

> regards

>

> J.G.Ferreira

>

> 1. Function which loops thru points

>

> for(int i=0; i < Samples->Count; i++)

> {

> SampleForm = (TForm1 *)Samples->Items[i];

> if(SampleForm==NULL) continue;

> SampleForm->AddPoint();

>

> Application->ProcessMessages();

> }

>

> while ( Mode==STOP)

> Application->ProcessMessages();

>

> if(Mode == RESET)

> break;

> // if (r % 50 == 0)

> Application->ProcessMessages();

>

> 2. Function which calls CFX API

>

> void __fastcall TForm1::AddPoint()

> {

> long tickVal2;

>

> if(tickVal1 == 0)

> tickVal1 = GetTickCount();

> if(PointIndex == 0)

> CFX->OpenDataEx(COD_XVALUES, SeriesCount, 1);

> else

> CFX->OpenDataEx(COD_XVALUES | COD_ADDPOINTS, SeriesCount, 1);

>

> for(int s=0; s < SeriesCount; s++)

> {

> CFX->XValueEx[s][PointIndex] = PointIndex;

> CFX->ValueEx[s][0] = (s+1) * 10;

>

> CFX->ValueEx[s][0] = (s+1) * 10;

> }

> CFX->CloseData(COD_XVALUES | COD_SMOOTH | COD_REALTIME);

>

> if(PointIndex > 0 && (PointIndex % 500) == 0)

> {

> tickVal2 = GetTickCount();

> Memo1->Lines->Add(IntToStr(tickVal2 - tickVal1));

> tickVal1 = 0;

> }

>

> PointIndex ++;

> }

>

>

>

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