Fill a listview is slow

[Michel Claveau]

Hi!

Fill listview is (very) slow (I think more than 10000 lines & 10 col)

Because there are many (100000) _SendMessage($hWnd, $LVM_SETITEMW, 0, $pItem, 0, "wparam", "ptr")

I search a way for fast fill a listview (perhaps if we send a big struct?)

Any idea?

Thank you in advance

[water]

Please have a look at this post.

[Zedna]

Also look at my post about ListView UDF speed optimization

http://www.autoitscript.com/forum/index.php?showtopic=67829

[Michel Claveau]

Hi!

Sorry for delay.

Thank you for answers.

I made various tests. The more fast is:

Func lv_AddArray($h, $hh, ByRef $aItems, $limite=29999)
     ;;;memo:$hh=GUICtrlGetHandle($h)
     Local $i,$nb,$nbvisu
     $nb=UBound($aItems)-1
     $nbvisu=50
     ;_SendMessage($hh, $LVM_DELETEALLITEMS) 

     _SendMessage($hh,$WM_SETREDRAW,0,0) 
     For $i=0 To _Min($nbvisu,$nb)
          GUICtrlCreateListViewItem($aItems[$i], $h)
     Next
     _SendMessage($hh,$WM_SETREDRAW,1,0)
     If $nb>$nbvisu Then
          _SendMessage($hh,$WM_SETREDRAW,0,0)
          For $i=$nbvisu+1 to $nb
               GUICtrlCreateListViewItem($aItems[$i], $h)
          Next
          _SendMessage($hh,$WM_SETREDRAW,1,0)
     EndIf
EndFunc

This routine calculates 50 lines, shows them, then calculates the rest (better aspect/depiction for users)

But it remains slow. And, nevertheless my old (2 years) laptop is 3 times as fast as the machine of Zedna... (tested with his example)

It remains slow...

Other thing: ReDraw+GUICtrlCreateListViewItem change the size of columns (with data's length).

_SendMessage($h, $LVM_SETITEMW... do not change the size, but it is more slow.

Perhaps a ReDraw+GUICtrlCreateListViewItem who do not change the size of columns would it be faster?

@+

[Authenticity]

>_< Supper speed. You can use GUICtrlSendMsg() if the control is AutoIt native control, i.e. GUICtrlCreate*.

[Michel Claveau]

Hi!

Supper speed. You can use GUICtrlSendMsg() if the control is AutoIt native control, i.e. GUICtrlCreate*.

GUICtrlSendMsg() is more slow than _SendMessage()

If you do not want my trick "display immediate and calculate next", the fastest means which I found is:

Func lv_AddArray($h, $hh, ByRef $aItems, $limite=9999)
    Local $i
    _SendMessage($hh,$WM_SETREDRAW,0,0)
    ;_SendMessage($hh, $LVM_DELETEALLITEMS) 
    For $i in $aItems
        GUICtrlCreateListViewItem($i, $h)
    Next
    _SendMessage($hh,$WM_SETREDRAW,1,0)
EndFunc

But, it remains still too slow for my needs.

[Yashied]

Hi!

GUICtrlSendMsg() is more slow than _SendMessage()

If you do not want my trick "display immediate and calculate next", the fastest means which I found is:

Func lv_AddArray($h, $hh, ByRef $aItems, $limite=9999)
    Local $i
    _SendMessage($hh,$WM_SETREDRAW,0,0)
    ;_SendMessage($hh, $LVM_DELETEALLITEMS) 
    For $i in $aItems
        GUICtrlCreateListViewItem($i, $h)
    Next
    _SendMessage($hh,$WM_SETREDRAW,1,0)
EndFunc

But, it remains still too slow for my needs.

You can hardly do faster than that. This is in principle the same as _GUICtrlListView_AddItem().

[Authenticity]

_WinAPI_PostMessage() seems to be faster if you're not expecting to receive the result.

[Yashied]

_WinAPI_PostMessage() seems to be faster if you're not expecting to receive the result.

Not to be the overflow?

[Michel Claveau]

Hi!

You can hardly do faster than that. This is in principle the same as _GUICtrlListView_AddItem().

Ok, but, in the doc of _GUICtrlListView_AddItem, I read: "You can not use this function to insert subitems"

and "Use _GUICtrlListView_AddSubItem" but this is very very slow, even if it is hard(trans)coded.

Добрый вечер (je ne parle pas russe ; merci à Reverso)