On 12/04/10 15:24, Bartosz wrote:
Loading a large plain data file takes very long.
This problem was described at:
http://wiki.services.openoffice.org/wiki/Calc/Performance/The_Ou_case
Look at file:
http://svn.services.openoffice.org/opengrok/xref/DEV300_m94/sc/source/filter/xml/xmlsubti.cxx
38% of time spent in ScMyTables::NewColumn() because of replicated use of
aTableVec[nTableCount - 1] (vector::operator[])
What do you think about instead using:
aTableVec[nTableCount - 1]
use instead:
aTableVec.back()
I think it could increase an perfomance slightly.
Did you measure if that makes a real difference?
Eike's suggestion on the wiki page is to reduce the number of operator[]
calls by obtaining a pointer or reference once. That will probably help
more.
Niklas
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