Hello,
I just tested the code on my older 2-cpu-core laptop and it loads
lightning fast (within 0.5 or 2 seconds for both gtk2 and gtk3.). So
it must be some peculiarities with my i7 8-core laptop, or with the
Ubuntu 12.04 itself.
Here are also GtkPerf tests on both these machine.
1) GtkPerf test on this super 8-cpu-core laptop.
CPU: Intel® Core™ i7-2670QM CPU @ 2.20GHz × 8.
RAM: 8GB.
GPU: GeForce GT 525M.
The combo loads very slowly on this.
$ gtkperf
GtkPerf 0.40 - Starting testing: Fri May 25 15:12:54 2012
GtkEntry - time: 0.03
GtkComboBox - time: 1.47
GtkComboBoxEntry - time: 0.97
GtkSpinButton - time: 0.09
GtkProgressBar - time: 0.07
GtkToggleButton - time: 0.65
GtkCheckButton - time: 0.09
GtkRadioButton - time: 0.13
GtkTextView - Add text - time: 0.50
GtkTextView - Scroll - time: 0.05
GtkDrawingArea - Lines - time: 0.52
GtkDrawingArea - Circles - time: 0.62
GtkDrawingArea - Text - time: 0.21
GtkDrawingArea - Pixbufs - time: 0.04
---
Total time: 5.45
---
2) GtkPerf test on my old 2-core-cpu laptop.
CPU: Genuine Intel(R) CPU T2080 @ 1.73GHz.
RAM: 2GB.
GPU: Advanced Micro Devices [AMD] nee ATI RC410 [Radeon Xpress 200M]
The combo appears almost instantly on this laptop. Especially fast on
gtk2, but gtk3 is quick too.
$ gtkperf
GtkPerf 0.40 - Starting testing: Fri May 25 15:38:56 2012
GtkEntry - time: 0.09
GtkComboBox - time: 3.31
GtkComboBoxEntry - time: 2.77
GtkSpinButton - time: 0.30
GtkProgressBar - time: 0.23
GtkToggleButton - time: 1.29
GtkCheckButton - time: 0.23
GtkRadioButton - time: 0.38
GtkTextView - Add text - time: 1.30
GtkTextView - Scroll - time: 0.46
GtkDrawingArea - Lines - time: 0.96
GtkDrawingArea - Circles - time: 1.70
GtkDrawingArea - Text - time: 0.92
GtkDrawingArea - Pixbufs - time: 0.19
---
Total time: 14.15
These GtkPerf tests do not support the bad video adapter theory. The
results are as expected.
I will later test Fedora and maybe LinuxMint 13 on this super machine.
Maybe I kill Ubuntu!
And BTW: The actual application will be a desktop-radio. It loads
station names and urls from a large xml-file
(Ref: http://home.online.no/~osmoma//radio/all_radio_channels.xml ).
The radio stations are Grouped by countries, genres of music etc,
and I will let user search among these channel groups. The xml-file
itself loads without delay.
Ok, thanks so far. All well.
Kindly
Osmo Moma Antero
On Thu, May 24, 2012 at 10:14 PM, Michael Cronenworth m...@cchtml.com wrote:
Osmo Antero wrote:
Adding rows to a combo box with a GtkListStore is immensely slow.
Is it right that adding 500 rows can take upto 10 seconds and the GUI
freezes?
I have similar hardware but with the NVIDIA driver so it only freezes
for about 2 seconds on my system.
[snip]
What is your opinion?
Should I use a thread to add data after the GUI has been displayed?
It looks like a GTK3 performance issue. Running your app against GTK2
results in the combo widget displaying instantly. Another reason why I
have not jumped from GTK2 to GTK3 yet.
You should file a bug with this test case.
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