6e4d7bbb0b
This suggestion keeps track of the most left node. The point is that constBegin() becomes a lot faster. That speeds up iteration a bit, and makes it O(1) to get the first element. The penalty in insert and remove is very small. On large trees it seems to be less than 1%. It should be noticed that constBegin() is a very common hint on my planned change to 5.1, and this opperation will without this patch cost 2 x log N. One when the user calls the hint with begin - and one where it is compared with begin. Other std::maps has a very fast begin(). E.g http://www.cplusplus.com/reference/stl/map/begin/ (begin with constant time) Change-Id: I221f6755aa8bd16a5189771c5bc8ae56c8ee0fb4 Reviewed-by: Lars Knoll <lars.knoll@digia.com> |
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| .. | ||
| animation | ||
| codecs | ||
| global | ||
| io | ||
| itemmodels | ||
| json | ||
| kernel | ||
| mimetypes | ||
| plugin | ||
| statemachine | ||
| thread | ||
| tools | ||
| xml | ||
| corelib.pro | ||