https://bugs.documentfoundation.org/show_bug.cgi?id=158914
Patrick Luby (volunteer) <guibomac...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |noelgran...@gmail.com
Summary|Calc leaks RAM when using |Calc leaks RAM when using
|Smart Scroll with Logitech |macOS accessibility
|Marble Mouse |
--- Comment #13 from Patrick Luby (volunteer) <guibomac...@gmail.com> ---
(In reply to Patrick Luby (volunteer) from comment #12)
> Created attachment 194184 [details]
> Snapshot of Instruments application after clicking on dozens of empty Calc
> cells with VoiceOver enabled
So I profiled my LibreOffice local master build using the Instruments
applications and here is what I saw:
1. I didn't need Smart Scroll to reproduce the rapid increase in memory when
clicking on empty cells. Instead, enabling macOS' built-in VoiceOver feature
also triggered this behavior. Note: I have changed the title of this bug to
reflect that.
2. The rapidly increasing memory usage is due to Calc creating a special
accessibility object for each selected cell (i.e. an ScAccessibleCell).
3. Closing the Calc document frees all of the ScAccessibleCell cells.
Technically there isn't a leak since all this memory for ScAccessibleCells is
freed when you close the Calc document, but these ScAccessibleCell apparently
use a lot of memory. In attachment #194184, I had clicked on less than 50 cells
in an empty Calc document and that resulted in Calc holding 100 MB of
ScAccessibleCells.
Next step: see if we can reduce the memory load when using Calc with
accessibility enabled. Not sure what can be done, but I will walk through the
code and see if maybe some parts of ScAccessibleCells can be reclaimed
immediately after reuse.
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