[Libreoffice-bugs] [Bug 144395] LibreOffice from 6.4 very slow and one CPU 100% while opening large Chinese .docx with 2521 pages

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=144395

Timur <gtimur at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |perf, regression
            Version|7.2.0.4 release             |6.4.7.2 release
            Summary|LibreOffice hangs on        |LibreOffice from 6.4 very
                   |opening large .docx file    |slow and one CPU 100% while
                   |                            |opening large Chinese .docx
                   |                            |with 2521 pages
     Ever confirmed|0                           |1

--- Comment #3 from Timur <gtimur at gmail.com> ---
Repro. I modified title to make it more specific and recognizable. 
Could be a duplicate. 

Interesting that one CPU goes 100% and that's not a single one, but different. 
That's seen with 'time' as user+sys is similar to real, but it should be higher
with multicore. 

To compare versions on the same system with time loexit:

5.2 m
real    1m49,340s
user    1m43,322s
sys     0m4,954s

6.0 m
real    1m33,933s
user    1m8,769s
sys     0m4,858s

6.3 m
real    0m50,940s
user    0m46,648s
sys     0m1,648s

6.4 o   1st time      2nd time
real    1m18,501s     1m11,729s
user    1m8,507s      1m6,241s
sys     0m3,689s      0m4,042s

6.4 m
real    3m33,772s
user    3m13,117s
sys     0m2,848s

7.3+ m
real    3m26,415s
user    3m22,688s
sys     0m3,214s

Based on time, I mark regression from 6.4.

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