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Question
CListctrl performace issue with more number of records
Hi All,
I am facing high performance problem when working with CListCtrl with owner draw data and styles.
When i am inserting 3000 records it takes more time. I want to avoid this delay. My idea is insert around 100 records initially and in background insert the remaining records. So user no need to wait till insert operation completes. Which is the best solution to solve this type problems. I cant change existing functionalities for Virtual list control.
Different ideas in my mind are
1) Use thread function to insert the data as background process
2) Insert the data into the list control when user scroll the list
3) Use the Peekmessage and Pump message instead of going for thread.
Please suggest me the solution/suggestion if any one faced like this problem.
Thanks.
Jerin
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by: KurtVonPosted on 2006-07-11 at 14:51:40ID: 17085877
Well, you could try turning off drawing with SetRedraw until all the items have been inserted and see if that speeds things up enough to be usable.
I've also used the background inserting technique, but it requires a great deal of thread-safe programming with critical sections. Also make sure the thread knows to exit if the control it is inserting into goes away.
Peek and pump will work too, but make sure the user can't close the dialog/change the data until after everything is inserted. Since Microsoft uses this technique I suspect it is the recommended one (or at least one that won't confuse the user).
Doing it as a scroll bar is not a good idea. The size of the scroll thumb is used by most people for estimating the amount of data. Nobody will like having the thing grow every time they scroll down. Not to mention that if the data they want is near the bottom they will have to scroll 100 lines at a time . . . too much of a pain.
Hope this helps.