Report Control - Performance issue

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Performance issue

Printed From: Codejock Forums
Category: Codejock Products
Forum Name: Report Control
Forum Description: Topics Related to Codejock Report Control
URL: http://forum.codejock.com/forum_posts.asp?TID=22585
Printed Date: 16 November 2024 at 9:58am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Performance issue

Posted By: cluster
Subject: Performance issue
Date Posted: 29 April 2015 at 9:48am

Hi Support Team,

I have a question concerning CXTPTrackControlItem::Draw from line 191 to 233:
There are 2 "for loops" with the same content. That means you draw all blocks twice. Why?

Another performance question:
You draw all blocks in a row no matter if they are visible or not. Would it not be preferable if you check if the blocks are out of visible range.

Thanks

Replies:

Posted By: Fredrik
Date Posted: 30 April 2015 at 8:05am

I think you are missing that the first loop executes when:

if (pBlock && !pBlock->IsKey()) // Notice the '!'
...

and the other loop when:

if (pBlock && pBlock->IsKey())
...

-------------
Windows 10, Visual Studio 20157, Toolkit Pro 18.3.0

Posted By: cluster
Date Posted: 01 May 2015 at 7:37am

oh yes, you are right! sorry! I have checked it several times but I didn't see it.

and with the other issue I have put this lines in the Draw function

CMy_XTPTrackBlock::Draw(CDC* pDC, CRect rc, BOOL bSelected)
...

    // Add to increase performance
    CRect rcVisible(rc);
    // ---- end----

    rc.left = pTrackControl->PositionToTrack(m_nPosition);
    rc.right = pTrackControl->PositionToTrack(m_nPosition + m_nLength);

    // Add to increase performance
    if(rc.left > rcVisible.right || rc.right < rcVisible.left) {
        m_rcBlock = rc;
        return 0;
    }
    // ---- end----

...