Bug 126265 - Slideshow start delayed
Summary: Slideshow start delayed
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Impress (show other bugs)
(earliest affected) release
Hardware: x86-64 (AMD64) All
: medium normal
Assignee: Not Assigned
Keywords: perf
Depends on:
Blocks: Slide-Show
  Show dependency treegraph
Reported: 2019-07-07 12:52 UTC by Buovjaga
Modified: 2022-01-12 06:20 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:

Perf flamegraph (309.24 KB, image/svg+xml)
2019-07-07 12:52 UTC, Buovjaga

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Description Buovjaga 2019-07-07 12:52:40 UTC
Created attachment 152616 [details]
Perf flamegraph

1. Open attachment 112640 [details]
2. Press F5

Stopwatch times for slide to appear:
6.2.4: 2.8 s
6.4: 7.77 s

Flamegraph is pointing to alpha blending and unpremultiply operations.

Arch Linux 64-bit
Build ID: e553b3698f6d8f4f606ebe21ed9857ee09f0c057
CPU threads: 8; OS: Linux 5.1; UI render: default; VCL: gtk3; 
Locale: fi-FI (fi_FI.UTF-8); UI-Language: en-US
Calc: threaded
Built on 5 July 2019
Comment 1 Telesto 2019-07-07 14:04:48 UTC
Version: (x86)
Build ID: 849b837d1a3b185a8dd893a8f6eaed53605bcab1
CPU threads: 4; OS: Windows 6.3; UI render: GL; VCL: win; 
TinderBox: Win-x86@42, Branch:master, Time: 2019-07-05_03:53:49
Locale: nl-NL (nl_NL); UI-Language: en-US
Calc: CL
Comment 2 Xisco Faulí 2019-07-10 08:27:16 UTC
this are my findings:
-oldest 6.2 commit: 6.50 seconds
-oldest 6.3 commit: 6.50 seconds
-oldest 6.4 commit: 8.50 seconds

all with clean profile, so I'm afraid I can't bisect it ...
Comment 3 Telesto 2020-01-12 10:54:11 UTC
Also slow with
Build ID: f3153a8b245191196a4b6b9abd1d0da16eead600
Locale: nl_NL

Removing bibisectRequest & regression
Comment 4 QA Administrators 2022-01-12 03:41:53 UTC Comment hidden (obsolete)
Comment 5 Buovjaga 2022-01-12 06:20:11 UTC
Tested with 7.4 Linux bibisect repo and it has now gone back to about 2 seconds, so let's close.