Bugs item #1643575, was opened at 2007-01-24 06:05 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1643575&group_id=7586 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: Performance problem in iostreams Initial Comment: iostreams dumps its internal buffers every time seekg or tellg is called even if the seek is to the current position. The following function should check if the seek position is within the buffer and, if so, adjust the buffers. template<typename T, typename Tr, typename Alloc, typename Mode> typename indirect_streambuf<T, Tr, Alloc, Mode>::pos_type indirect_streambuf<T, Tr, Alloc, Mode>::seek_impl (stream_offset off, BOOST_IOS::seekdir way, BOOST_IOS::openmode which) { if (pptr() != 0) this->BOOST_IOSTREAMS_PUBSYNC(); // sync() confuses VisualAge 6. if (way == BOOST_IOS::cur && gptr()) off -= static_cast<off_type>(egptr() - gptr()); setg(0, 0, 0); setp(0, 0); return obj().seek(off, way, which, next_); } jerker.ohman@umetrics.com ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1643575&group_id=7586 ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Boost-bugs mailing list Boost-bugs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs