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Re: Repair move is slow and could be more intelligent

From: Stefan Küng <tortoisesvn_at_gmail.com>
Date: Sat, 25 Apr 2009 19:25:13 +0200

Robert Roessler wrote:
> Stefan Küng wrote:
>> Robert Roessler wrote:
>>> Stefan Küng wrote:
>>>> webpost_at_tigris.org wrote:
>>>>>> webpost_at_tigris.org wrote:
>>>>>>>> Alexander Iljin wrote:
>>>>> ...
>>>>> Not quite sure how you are sorting 15000 items that slow? On my
>>>>> machine, sorting 15000 items of a decent size (300 bytes) takes less
>>>>> than ½ sec in a completely un-optimized program and about half if I
>>>>> sort the pointers to the objects only.
>>>> It's not the sorting that takes so much time. But after sorting the list
>>>> control must be filled again, and that takes more time than the actual
>>>> sorting.
>>> Obviously everyone knows about turning off redraw while filling a
>>> large[r] list control, but I have also had good results with "owner
>>> DATA" (not owner DRAW, different issue).
>>> With owner DATA, the control doesn't store all of the data itself - the
>>> owner just gets sent a message whenever the data for a particular item
>>> needs to be displayed.
>>> This can work especially well with large numbers of items, both because
>>> the control's own heavyweight storage mechanisms are not being used, but
>>> also if one has list items that can easily be generated/synthesized on
>>> demand, then NO ONE has to allocate the storage. ;)
>> There's no need to lecture me about the list control. Owner data is used
>> in the log dialog and some other dialogs in TSVN that use the list control.
>> And of course turning off redrawing is done too.
>> The only reason why there's no owner-data used in the status list
>> control (that's used in the commit dialog) is that it's a lot of work,
>> and for most working copies wouldn't gain any speed improvements. Just
>> as an example, my wc of the TSVN source with all the externals currently
>> shows a size of 5GB in 30'000 files (that's of course including all the
>> .svn folders and its content). And sorting/filling the list control
>> takes half a second on my machine (which is not very fast).
>> However, if you want to contribute more than lectures, feel free to
>> provide a patch.
> Chill, Stefan - that wasn't a "lecture", and was not in any case
> targeted at you... at most, it is an educational tidbit for those
> discovering this thread in some future search.

Sorry, bad day - and a terrible headache...


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Received on 2009-04-25 19:25:48 CEST

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