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b800d8b94a
The patch also speeds up swapSections and hideSection a lot. It work by eliminating the Span. (That is forcing each 'Span' to have exactly one element) That saves a lot of loops since we can often lookup info fast - and/or change it fast. Since it is often a complexity change, it is difficult to put %-increase on. (The most used linear function is recalcSectionStartPos() - and it has a very low constant) However comparing with the new benchmark (2500 rows) swapSection, showHideSection and moveSection are about 20-40 factors faster. (Yes, it is a lot faster!) In the benchmark moveSection is about 300 factors faster. Beside being a far better model it is also far more simple. This fix partly solves: Task-number: QTBUG-19092 Change-Id: I8deeb9315276d15c68e8a27d5dcb8e0c0badf367 Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com> |
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