When a sufficient amount of cells (6 on an old laptop, ~20 on a recent one) are selected in 18.104.22.168 there is an increasing delay when selecting new cells until Calc freezes.
It happens with or without OpenCL enabled.
I can't reproduce it with 6.0.0-rc1.
Steps to Reproduce:
- Open a new spreadsheet in calc.
- Hold CTRL
- Click on empty non-adjacent cells to select them. The slowdown happens around 20 cells selected.
Calc slows down and freeze
The selection of new cells should not freeze Calc.
User Profile Reset: Yes
OpenGL enabled: Yes
Build ID: 5.4.4-1
Threads CPU : 4; OS : Linux 4.14; UI Render : par défaut; VCL : gtk3;
Locale : fr-FR (fr_FR.utf8); Calc: CL
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0
Build ID: a61f45499856aad9910d82af1312a163504c15c2
CPU threads: 8; OS: Linux 4.9; UI render: default; VCL: kde4;
Locale: nl-BE (en_US.UTF-8); Calc: group
Reproducible with LO 5.4.4. from Ubuntu PPA and 22.214.171.124.0+ built at home under Ubuntu 16.04 x86-64 : after about 20 selected cells, it take several seconds for each additional selection.
Build ID: 1:5.4.4~rc2-0ubuntu0.16.04.1~lo1
Threads CPU : 4; OS : Linux 4.4; UI Render : GL; VCL : gtk3;
Locale : fr-FR (fr_FR.UTF-8); Calc: single
Build ID: 58329573e6d58b2f9b9d049b2bdc79e6a3c089f0
Threads CPU : 4; OS : Linux 4.4; UI Render : GL; VCL: gtk3;
Locale : fr-FR (fr_FR.UTF-8); Calc: threaded
Same behavior for 126.96.36.199.0+ if not threaded.
Best regards. JBF
Created attachment 142018 [details]
Spiking processor from selecting non-adjacent cells in Calc
Build ID: 1:6.0.3-0ubuntu1
CPU-threads: 4; Besturingssysteem: Linux 4.15; UI-render: standaard; VCL: gtk3;
Locale: nl-NL (nl_NL.UTF-8); Calc: group
I noticed two things:
1. The speed of selecting the non-adjacent cells (with CTRL) makes a difference. When selecting very fast, Calc cannot follow the process after about 5 cells. When selecting slow, it an take up to about 25 cells before the extreme slow down starts.
2. One processor thread spikes when this happens. See the screen-region picture I added.
Duping to a newer one as it has more data/testing info.
*** This bug has been marked as a duplicate of bug 121860 ***