[Libreoffice-bugs] [Bug 116912] New: UI: Excessive Redraw/ Recalculate Effort During Resize Operation

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=116912

            Bug ID: 116912
           Summary: UI: Excessive Redraw/Recalculate Effort During Resize
                    Operation
           Product: LibreOffice
           Version: 5.1.6.2 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: tcolley at livingdata.com.au

I observe that Calc (V5.1.6.2) seems to do multiple redraws during the window
resize operation. This works fine for small simple files. For larger files,
with higher processing loads, it is a problem. I find that after a resize
operation, I can wait from 1-30 seconds for the multiple redrawings to finish
executing and catch up with the final window size. I think this redrawing
includes multiple recalculations of formulas, of which VLOOKUP is noted for
being particularly demanding. The queuing and execution of multiple redraws
seems completely unnecessary and makes calc files, that are otherwise quite
functional, difficult to resize. Could the redraw procedure be reworked so that
there is no accumulation or queuing of multiple redraw or recalculate events?

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