[Libreoffice-bugs] [Bug 125236] New: looks like the "Bug 54638 - Too slow to load/save file with lots of cells with multi-line contents" is back

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=125236

            Bug ID: 125236
           Summary: looks like the "Bug 54638 - Too slow to load/save file
                    with lots of cells with multi-line contents" is back
           Product: LibreOffice
           Version: 5.2.7.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: dv.underworld at gmail.com

Description:
Hi,

since I don't work now with such calc files regularly as I did years ago, only
recently I noticed a possible regression of the Bug 54638.
You can simply test the same sample attachment from that (Bug 54638).
Even if I reset the LO profile (remove the whole profile
"~/.config/libreoffice/4/") and start from scratch, create the same content
into a new ODF v1.2 extended (default) save file (which for an instance will
have about 451KiB when saved), makes no difference, still takes very long.

Load:
Opening it on the more powerful (PC 1) takes about 16 seconds.
Opening it on the less powerful (PC 2) takes about 9 seconds.

Save:
Saving it on the more powerful (PC 1) takes about 5-6 minutes!
Saving it on the less powerful (PC 2) takes about 8-9 minutes!

While the duration of load in seconds is still tolerable, the SAVE in minutes
isn't.
In both SAVE cases, only one CPU core is 100% utilized during all that time.


Thank you for checking it.

Steps to Reproduce:
Load or save the sample attachment from (Bug 54638).

Actual Results:
Takes minutes to save the sample.

Expected Results:
faster saving/export behaviour


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
Affected LO calc versions tested & HW+SW details:
(PC 1)
CPU: Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz (On-line CPU(s) list: 0-7)
RAM: 16GB
OS: Arch Linux
kernel: Linux 4.19.41-1-lts #1 SMP Wed May 8 15:58:57 CEST 2019 x86_64
GNU/Linux
LO Help\About:
        {
                Version: 6.2.3.2
                Build ID: 6.2.3-2
                CPU threads: 8; OS: Linux 4.19; UI render: default; VCL: x11; 
                Locale: sk-SK (en_GB.UTF-8); UI-Language: en-US
                Calc: threaded
        }


(PC 2)
CPU: Intel(R) Pentium(R) CPU G3430 @ 3.30GHz (On-line CPU(s) list: 0,1)
RAM: 4GB
OS: Debian GNU/Linux 9.9 (stretch)
kernel: Linux 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1 (2019-04-12) x86_64
GNU/Linux
LO Help\About:
        {
                Version: 5.2.7.2
                Build ID: 1:5.2.7-1+deb9u7
                CPU Threads: 2; OS Version: Linux 4.9; UI Render: default; VCL:
gtk2;
                Locale: sk-SK (en_GB.UTF-8); Calc: group
        }

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