[Bug 14303] Listview: select all is incredibly slow.

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=14303





--- Comment #3 from Nikolay Sivov <bunglehead at gmail.com>  2009-05-31 05:56:06 ---
(In reply to comment #2)
> Created an attachment (id=15044)
 --> (http://bugs.winehq.org/attachment.cgi?id=15044) [details]

Patch is obviously wrong:
- LVN_ITEMCHANGING/LVN_ITEMCHANGED notifications ignored;
- callback mask ignored.

Going further such optimization with storing only range index isn't possible
with current design cause it requires item state synchronization with ranges
before sorting and after it - for 10000 items it won't be so fast.

(In reply to comment #0)
> I've created a patch that sets the range of selected items. This select all
> happens much more instantaneously.

This could be a result of omitted notifications.

(In reply to comment #0)
> With tens of thousands of items, this takes a _long_time_.
> 

Maybe it's time to switch LVS_OWNERDATA style on.

After that's a potential WONTFIX (or INVALID maybe) for me. I'd like to see any
thoughts on that.

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