Bug 85482 - FILESAVE/FILEOPEN: very slow loading of .ODS saved from .XLSX
Summary: FILESAVE/FILEOPEN: very slow loading of .ODS saved from .XLSX
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Calc (show other bugs)
(earliest affected)
Inherited From OOo
Hardware: Other All
: high major
Assignee: Not Assigned
Whiteboard: target:6.3.0
Keywords: haveBacktrace, perf
Depends on:
Blocks: File-Opening
  Show dependency treegraph
Reported: 2014-10-26 11:29 UTC by tommy27
Modified: 2019-04-27 13:36 UTC (History)
4 users (show)

See Also:
Crash report or crash signature:

.ODS version of attachment 108343 (1.28 MB, application/vnd.oasis.opendocument.spreadsheet)
2015-06-27 07:02 UTC, tommy27
Callgrind output from 6.0 (7.75 MB, application/x-xz)
2017-10-29 18:54 UTC, Buovjaga
Perf flamegraph (1.98 MB, image/svg+xml)
2019-04-18 20:30 UTC, Buovjaga

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Description tommy27 2014-10-26 11:29:24 UTC
load .XLSX attachment 108343 [details] from Bug 85399 in 4.4.x master (it will take a few seconds but that's not the point of the current report) then save it as .ODS and close file once is finished. 

then click on the it's thumbnail in the start center to reload it.
LibO hangs while reopening that .ODS.

tested using
Build ID: 6ba8b7f5eacac969e4781d63718083a05491b1bc
TinderBox: Win-x86@42, Branch:master, Time: 2014-10-24_02:23:51

here's my configuration (it's a 5 years old laptop):

O/S: Microsoft Windows 7 Professional 64-bit SP1
CPU: Intel Mobile Core 2 Duo @ 2.26GHz	
RAM: 4,00GB Dual-Channel DDR2 @ 399MHz (6-6-6-18)
Motherboard: Inventec 1505 (CPU)
Comment 1 Buovjaga 2014-10-26 12:20:50 UTC
Reproduced hang.

Win 7 64-bit Version:
Build ID: 0a82645c360158f9cc0fdabe2a52f1ff8f981bed
TinderBox: Win-x86@39, Branch:master, Time: 2014-10-24_06:59:23
Comment 2 A (Andy) 2014-10-26 13:20:45 UTC
I tried to test it.  But my LO (Win 8.1) already hangs up if I try to save it an ods file and I have to quit LO.
Comment 3 Jean-Baptiste Faure 2014-10-26 20:22:08 UTC
Not really hang in master but 100% CPU, perhaps endless loop. seems not be able to save this document as OpenDocument.

Tested under Ubuntu 14.04 x86-64 with my own builds.
Version: Build ID: 8c6d3cd45e2183a19f91e9a30c1fdc699de393f8
Version: Build ID: 9e8429b51eb7a1ef151ba40bb606910354dd5506

Best regards. JBF
Comment 4 Buovjaga 2015-01-07 15:12:46 UTC
Doesn't hang on 4.5, had to wait a bit.
Tommy, can you retest?

Win 7 64-bit Version:
Build ID: 8c7f6830e767897d3a0e88f75fc8d7ef7fca95dc
TinderBox: Win-x86@42, Branch:master, Time: 2015-01-06_00:47:25
Comment 5 tommy27 2015-01-10 12:51:53 UTC
retested with alpha (late december build) under a Win8.1 x64 brand new 
laptop (SSD drive) and the loading is very very slow... it takes more than 2 minutes to load that .ods 

I suppose that on older PC the waiting time could be even longer...

I'm gonna retest later on with the latest daily build
Comment 6 tommy27 2015-01-10 13:12:10 UTC
no change... it still takes 2 minutes and 21 seconds to load with latest master build.
Build ID: 90d8f4fca566e46171b260ee3aadc655871c92ba
TinderBox: Win-x86@42, Branch:master, Time: 2015-01-10_00:24:59
Locale: it_IT


I revert status to NEW and change summary from:
FILESAVE/FILEOPEN: LibO hangs opening .ODS saved from .XLSX

FILESAVE/FILEOPEN: very slow loading of .ODS saved from .XLSX
Comment 7 tommy27 2015-06-27 07:02:57 UTC
Created attachment 116860 [details]
.ODS version of attachment 108343 [details]

no performance improvement in LibO
Build ID: df7595a5f5871f8343e4ee3869ad153e3ae4a7f3
TinderBox: Win-x86@62-merge-TDF, Branch:MASTER, Time: 2015-06-25_14:29:31

I attach the .ODS saved version of the original .XLSX attachment 108343 [details]
Comment 8 tommy27 2016-10-06 21:11:01 UTC
it takes 2 minutes and 40 seconds to load with LibO

Build ID: 4c70a1a6666a079872b8f1966bd398e924dc1d1a
CPU Threads: 4; OS Version: Windows 6.29; UI Render: default; 
TinderBox: Win-x86@42, Branch:master, Time: 2016-09-22_06:54:24
Locale: it-IT (it_IT); Calc: group
Comment 9 QA Administrators 2017-10-23 14:16:00 UTC Comment hidden (obsolete)
Comment 10 Jean-Baptiste Faure 2017-10-28 21:31:45 UTC
Remove myself from CC: not interested anymore in issues with MS things.

Best regards. JBF
Comment 11 Buovjaga 2017-10-29 18:54:25 UTC
Created attachment 137358 [details]
Callgrind output from 6.0

Took a callgrind of opening the .ods.

Arch Linux 64-bit, KDE Plasma 5
Build ID: 7a2e7c32d38db02aaa5d78d5e8aaf86cabfde586
CPU threads: 8; OS: Linux 4.13; UI render: default; VCL: kde4; 
Locale: fi-FI (fi_FI.UTF-8); Calc: group
Built on October 28th 2017
Comment 12 Buovjaga 2017-10-29 19:01:29 UTC
Slow already in 3.3

Arch Linux 64-bit
LibreOffice 3.3.0 
OOO330m19 (Build:6)
tag libreoffice-
Comment 13 QA Administrators 2018-10-30 03:56:34 UTC Comment hidden (obsolete)
Comment 14 Colin 2018-12-07 13:27:23 UTC Comment hidden (obsolete)
Comment 15 Buovjaga 2019-04-18 20:30:59 UTC
Created attachment 150865 [details]
Perf flamegraph

Did it from the XLSX -> ODS -> reopen, but now it only takes about 16 seconds.

Still took a flamegraph of ODS opening just in case and might show it to a dev.

Arch Linux 64-bit
Build ID: 1fee3f1da6291bfbcd75455512726215d41b3e83
CPU threads: 8; OS: Linux 5.0; UI render: default; VCL: gtk3; 
Locale: fi-FI (fi_FI.UTF-8); UI-Language: en-US
Calc: threaded
Built on 18 April 2019
Comment 16 Xisco Faulí 2019-04-24 11:29:53 UTC
the attached .ODS file takes

real	0m49,353s
user	0m35,714s
sys	0m0,684s


Build ID: 90e3b47b52f26420425a7417d2f51b6a386282d9
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3; 
Locale: ca-ES (ca_ES.UTF-8); UI-Language: en-US
Calc: threaded


real	0m52,557s
user	0m51,286s
sys	0m0,714s


Build ID: 6eeac3539ea4cac32d126c5e24141f262eb5a4d9
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3; 
Locale: ca-ES (ca_ES.UTF-8); Calc: group threaded

not much progress seen here...
Comment 17 Commit Notification 2019-04-27 06:59:12 UTC
Noel Grandin committed a patch related to this issue.
It has been pushed to "master":


tdf#85482 FILEOPEN: very slow loading of .ODS

It will be available in 6.3.0.

The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:

Affected users are encouraged to test the fix and report feedback.
Comment 18 Xisco Faulí 2019-04-27 13:36:26 UTC
Verified in

Build ID: 3ab6d246cc44617af5ed416b5d49f2f35b61ceea
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3; 
Locale: ca-ES (ca_ES.UTF-8); UI-Language: en-US
Calc: threaded

now it takes

real	0m15,858s
user	0m16,464s
sys	0m0,526s

@Noel Grandin, thanks for fixing this!!