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| − | '''Specific bottlenecks''' to be worked on, identified using tools such as
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| − | <code>[[Callgrind| valgrind --tool=callgrind]]</code>.
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| | == The Zaske case == | | == The Zaske case == |
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| − | Content relocated to [[Calc/Performance/Zaske]], section preserved for external references linking here. | + | Done. Content relocated to [[Calc/Performance/The_Zaske_case]], section preserved for external references linking here. |
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| − | == The Ou case ==
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| − | Loading a large plain data file takes very long.
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| − | References:
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| − | * [http://blogs.zdnet.com/Ou/?p=120 George Ou's blog entry]
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| − | * [http://www.lanarchitect.net/Examples/200264-l.sxc The test case file] (.sxc)
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| − | * [http://www.lanarchitect.net/Examples/200264-l.zip Same data, but zip'ed Excel-XML]
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| − | Findings:
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| − | * source/filter/xml/xmlsubti.cxx
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| − | ** 38% of time spent in ScMyTables::NewColumn() because of replicated use of aTableVec[nTableCount - 1] (vector::operator[]) <br> Note: percentage may be off due to compilation without optimization to obtain exact line numbers that may result in STLport's vector methods being differently compiled.
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| − | *** proposed fix: should obtain the pointer once instead.
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| − | ** Similar for other places where aTableVec[xxx] is used.
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| − | * '''TODO:''' Check all ScMyTables::.*() and ScMyTableData::.*()
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| − | ** Especially for 63342857 calls to AddColumn() and NewColumn() that result in 1168654944 calls to operator[] ...
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| − | ** 63081776 calls to AddColumn() originate from ScXMLTableRowCellContext::EndElement()
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| − | ** Those are highly suspicious and seem to indicate that too many temporary elements are created for empty columns/cells (needs verification).
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| | == Sorting values within functions == | | == Sorting values within functions == |
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| − | Content relocated to [[Calc/Performance/sorting_values_within_functions]], section preserved for external references linking here. | + | Done. Content relocated to [[Calc/Performance/sorting_values_within_functions]], section preserved for external references linking here. |
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| − | == Querying data within functions ==
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| − | An internal customer's document (sorry, can't publish) doing lookup queries
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| − | that don't fit into the current caching strategy.
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| − | Findings:
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| − | * 8% in 51613353 calls to com::sun::star::i18n::casefolding::getNextChar() via
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| − | ** 39696595 calls to utl::TransliterationWrapper::isEqual() via
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| − | *** ScTable::ValidQuery() via
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| − | **** 8888 calls to ScQueryCellIterator::GetThis() via
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| − | ***** lcl_LookupQuery()
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| − | * 5% in ScTableValidQuery() most in String() and ~String() of aCellStr
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| − | * 200873636 calls to com::sun::star::i18n::casefolding::getNextChar() via
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| − | ** 33173401 calls to com::sun::star::i18n::Transliteration_caseignore::compare()
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| − | * 5% in com::sun::star::i18n::oneToOneMappingWithFlag::find()
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| − | ** Replicated mpIndex[high] access, might be better using temporary pointer.
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| − | * 5% in com::sun::star::i18n::casefolding::getValue()
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| − | * 58% overall in ScTable::ValidQuery() and below
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| − | ** '''TODO:''' Cache results of ValidQuery()? Similar to ScLookupCache?
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| − | * 11% overall in 27341713 calls to ScBroadcastAreaSlot::StartListeningArea() and below, of which 10% are in ::std::set::insert() and below.
| + | == other == |
| − | ** '''TODO:''' refactor implementation of broadcast slots.
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| | + | For other performance optimization tasks previously located here please see the individual pages listed under [[Calc/Performance]]. |
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| − | [[Category:Calc|Performance/Specific_Bottlenecks]] | + | [[Category:Calc]] |
| − | [[Category:Performance]]
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| − | [[Category:To-Do]]
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| − | [[Category:InProgress]]
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For other performance optimization tasks previously located here please see the individual pages listed under Calc/Performance.
