Hello,
The appended small 12-line patch allows to sort bases also by variation
count and comment count from the maintenance window.
I remember a discussion whether to allow column sorting in the game list
window. When sorting a base it is now done in three steps. In the first the
index is resorted and in the second the games are updated and written to the
disc. The first two are done when sorting is called in the maintenance
window. The first step takes for 5.000.000 games around 5 seconds. The
second writes the index. As a third step a user should compact the game file
to enforce its recreation. Otherwise any search over all games will be slow,
because subsequent games are not in the same game block.
So sorting columns would have a reasonable performance and can be
implemented in two ways:
The first try is simply to reuse this first step above but not making it
persistent. The problem in large bases then is that searching will be slow,
because the games are distributed randomly in the game file.
The second solution would be to add a mapping filter as soon as a user sorts
games in the gamelist window. The advantage is that this is invisible to the
search algorithms. The price is that it will cost around 20 MB memory for a
5.000.000 database.
But I am not sure whether sorting is really necessary. I would use it only
to get commented and top-rated games to the top of the list, but this I get
also by sorting the base after each import of new games.
Gerd
sort.patch
Description: Binary data
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