[Libreoffice-bugs] [Bug 109097] mdds accelerating random lookups

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=109097

--- Comment #6 from Aron Budea <baron at caesar.elte.hu> ---
Created attachment 134730
  --> https://bugs.documentfoundation.org/attachment.cgi?id=134730&action=edit
Log of accessed rows/columns

Michael, the table is read several times with different access patterns, which
ranges from a single column's value being read to more than 10 values being
read (both per row).
The pattern is mostly the same throughout a loop on the table, but there's a
bit of variance as well, and I've also seen few cases of jumping back and forth
between rows, otherwise row order is stable. Attaching a log with the accesses.

Markus, the lcl_GetMinExtent(...) you mentioned is being inlined in
ScMatrixRef::lcl_MatrixCalculation(...) and ScInterpreter::MatConcat(...),
right? I can see ScMul() and CalculateAddSub(...) in ScInterpreter that rely on
lcl_MatrixCalculation(...), but their contribution is far from 75%. What else
needs considering here?

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