On Tuesday 14 June 2011 09:19:20 Jos van den Oever wrote: > On Monday, June 13, 2011 19:02:09 PM Jos van den Oever wrote: > > When run on a set of 600 ppt files from a.o. kofficetests, this is the > > output from valgrind: > > simpletest: (normal run time: 5.7 seconds) > > ==28930== total heap usage: 2,457,961 allocs, 2,457,954 frees, > > 218,241,950 bytes allocated > > apitest: (normal run time: 2.9 seconds) > > ==28852== total heap usage: 254,832 allocs, 254,825 frees, 52,421,077 > > bytes allocated > > The speed for apitest is now down to 1.3 seconds, making the speedup 4.3x. > The other numbers stay the same.
Impressive. Thanks for sharing. > The current parser that Calligra uses, uses QSharedPointer, QList, QVector > and QByteArray. api.h does not use any of these. In the MSWord-filter we do; QBuffer buffer; QByteArray array; array.resize(stream.size()); unsigned long r = stream.read((unsigned char*)array.data(), stream.size()); buffer.setData(array); LEInputStream wdstm(&buff1); where the stream.read takes according to massif >70% of the mem during the doc=>odt conversation. Your note above made me think if we cannot save that allocation and operate direct on the stream... _______________________________________________ calligra-devel mailing list calligra-devel@kde.org https://mail.kde.org/mailman/listinfo/calligra-devel
