Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

 Mike and  Luboš,

Many thanks for your help on this topic.

Regards,

Steve

On Thu, 23 Apr 2020 at 11:16, Mike Kaganski <mikekaganski@hotmail.com>
wrote:

> On 23.04.2020 13:12, Luboš Luňák wrote:
> > On Thursday 23 of April 2020, Stephen Fanning wrote:
> > > As for the processing itself, I remain unclear about how Calc allocates
> > > tasks to threads. Can we give the user any general advice on how he
> could
> > > structure his spreadsheet to gain the maximum performance benefits from
> the
> > > availability of multiple cores? Or maybe there are ways to organise a
> > > spreadsheet that will frustrate Calc's attempts to multi-thread, which
> we
> > > ought to advise against?
> >
> >  Technically threads are generally used only for formula groups, which
> are a
> > sufficient number of adjacent cells in a column that use the same
> formula
> > (and get different results because of relative cell addressing). In UI
> terms,
> > write e.g. "=A1*2" to B1, grab the bottom-right corner of the cell and
> extend
> > down. But it's implementated this way because that's usually how large
> > spreadsheets are created. So I think it's a needless complication to be
> > specific about this.
>
> IMO it's still useful to mention that the optimization is column-based.
> Because many people don't realize that row-based layout is potentially
> less efficient. This would be beneficial to those who don't create
> spreadsheets according to how it's "usually" done.
>
> --
> Best regards,
> Mike Kaganski