Codejock Developer Community : Performance issue

Performance issue : oh yes, you are right! sorry!...

Fri, 01 May 2015 07:37:54 +0000

Author: cluster
Subject: 22585
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----

...

Performance issue : I think you are missing that the...

Thu, 30 Apr 2015 08:05:10 +0000

Author: Fredrik
Subject: 22585
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())
...

Performance issue : Hi Support Team,I have a question...

Wed, 29 Apr 2015 09:48:58 +0000

Author: cluster
Subject: 22585
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