[Libreoffice-bugs] [Bug 118822] PDF export with bitmap Page background rather slow (not with lossless)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=118822

--- Comment #8 from Buovjaga <todventtu at suomi24.fi> ---
(In reply to Julien Nabet from comment #7)
> Yes quite interested! :-)
> I changed the perfexit alias so it corresponds to my env but then what
> should I do?
> I mean, I suppose I must download first scripts about flamegraph and install
> them somewhere?
> Then, what alias to launch?

For this report, you should use perflibo type of command, where you first
launch LibO, open the PDF export dialog and then give perflibo in a terminal.
Then after the exporting is done, hit Ctrl-C in the terminal where perf is
running.

Steps:
1. Install perf from your distro's package repo
2. git clone https://github.com/brendangregg/FlameGraph
3. Do the perf trace like I described above. A file called perf.data is created
4. Do the SVG graphing so you point to the .pl scripts. A file called perf.svg
is created.

In the How to debug section we have:
perf script | ../FlameGraph/stackcollapse-perf.pl | ../FlameGraph/flamegraph.pl
--width 4096 --height 24 > perf.svg
   firefox perf.svg

So just replace the paths to where you cloned FlameGraph

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