Kdevelop 4.7.3 on kubuntu 16.04 slow file open

[Erik Rull]

Hi all,

I upgraded to kubuntu 16.04 LTS today and wanted to continue my work with
the new kdevelop version. But the file open performance is terrible.
I select the file from the dialog, the dialog disappears and it takes more
than 10 seconds to open even small files (some lines of code).

There is enough disk space and memory available and the disk is fast enough.

Any ideas on how to speed up this task? Worked fine and performant on the
14.04 LTS...

Thanks.

Best regards,

Erik

[Milian Wolff]

Post by Erik Rull
Hi all,
I upgraded to kubuntu 16.04 LTS today and wanted to continue my work with
the new kdevelop version. But the file open performance is terrible.
I select the file from the dialog, the dialog disappears and it takes more
than 10 seconds to open even small files (some lines of code).
There is enough disk space and memory available and the disk is fast enough.
Any ideas on how to speed up this task? Worked fine and performant on the
14.04 LTS...

Please profile this, it sounds like a serious issue somewhere, probably
platform specific and/or software version dependent. I've never seen this
myself.

Try:

perf record --call-graph dwarf kdevelop
-> reproduce step, potentially multiple times, then quit
perf report --stdio > cpu.report.txt

then

perf record -e sched:sched_stat_sleep \
-e sched:sched_switch \
-e sched:sched_process_exit \
--call-graph dwarf \
-o perf.sleep.data.raw kdevelop
perf inject --sched-stat -i perf.sleep.data.raw -o perf.sleep.data
perf report --stdio > sleep.report.txt

then upload both, cpu.report.txt and sleep.report.txt somewhere such that we
can access it and put a link to it here.

Bye