Bug 30103 - 28 times slower than 1.8.10
Summary: 28 times slower than 1.8.10
Status: RESOLVED NOTOURBUG
Alias: None
Product: cairo
Classification: Unclassified
Component: general (show other bugs)
Version: 1.10.0
Hardware: x86-64 (AMD64) Linux (All)
: medium critical
Assignee: Carl Worth
QA Contact: cairo-bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-09-09 07:23 UTC by wbrana
Modified: 2013-06-02 10:56 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

Attachments
patch (581 bytes, patch)
2011-07-04 00:29 UTC, wbrana 		Details | Splinter Review
View All

Description wbrana 2010-09-09 07:23:43 UTC 
After upgrade from 1.8.10, many applications become very slow.
According to GtkPerf, font rendering is 28 times slower.

1.10.0:

GtkPerf 0.40 - Starting testing: Thu Sep  9 16:14:19 2010

GtkEntry - time:  0.57
GtkComboBox - time:  2.80
GtkComboBoxEntry - time:  2.23
GtkSpinButton - time:  0.30
GtkProgressBar - time:  0.50
GtkToggleButton - time:  0.47
GtkCheckButton - time:  0.45
GtkRadioButton - time:  1.18
GtkTextView - Add text - time: 27.13
GtkTextView - Scroll - time:  4.04
GtkDrawingArea - Lines - time:  4.15
GtkDrawingArea - Circles - time:  4.18
GtkDrawingArea - Text - time: 61.83
GtkDrawingArea - Pixbufs - time:  0.05
 ---
Total time: 109.88

1.8.10:

GtkPerf 0.40 - Starting testing: Thu Sep  9 16:11:24 2010

GtkEntry - time:  0.13
GtkComboBox - time:  2.39
GtkComboBoxEntry - time:  1.63
GtkSpinButton - time:  0.26
GtkProgressBar - time:  0.11
GtkToggleButton - time:  0.33
GtkCheckButton - time:  0.28
GtkRadioButton - time:  0.52
GtkTextView - Add text - time:  9.69
GtkTextView - Scroll - time:  1.52
GtkDrawingArea - Lines - time:  3.40
GtkDrawingArea - Circles - time:  4.05
GtkDrawingArea - Text - time:  2.22
GtkDrawingArea - Pixbufs - time:  0.04
 ---
Total time: 26.56
Comment 1 Chris Wilson 2010-09-09 07:40:28 UTC 
Urm, fix the applications to use not gdk_draw_layout() and then they will many times faster in 1.8.10 as well. If you do choice to bypass all the caches both Pango and Cairo offer, and to use filled paths instead of sub-pixel rendered glyphs...
Comment 2 Benjamin Otte 2010-09-09 08:35:51 UTC 
<ickle> go and call me an idiot in the bug report.

Gtk is using pango_cairo_show_glyphs() which surely makes use of Cairo's caching awesomeness, so this is not a problem. It's something else.

I suppose the reporter is using nvidia drivers?
Also, what GTK theme do you use?
Comment 3 wbrana 2010-09-09 09:29:25 UTC 
I'm using nvidia drivers 260.19.04 and built-in theme (Raleigh?)
with changed colors.
Comment 4 wbrana 2010-09-11 13:02:53 UTC 
Cairo 1.10.0 with patch which disabled HW gradients is much faster


GtkPerf 0.40 - Starting testing: Sat Sep 11 15:43:48 2010

GtkEntry - time:  0.14
GtkComboBox - time:  2.83
GtkComboBoxEntry - time:  1.70
GtkSpinButton - time:  0.27
GtkProgressBar - time:  0.12
GtkToggleButton - time:  0.34
GtkCheckButton - time:  0.29
GtkRadioButton - time:  0.56
GtkTextView - Add text - time:  9.93
GtkTextView - Scroll - time:  1.73
GtkDrawingArea - Lines - time:  4.11
GtkDrawingArea - Circles - time:  4.30
GtkDrawingArea - Text - time:  1.88
GtkDrawingArea - Pixbufs - time:  0.05
 ---
Total time: 28.27
Comment 5 Andrea Canciani 2010-10-18 04:23:07 UTC 
It looks like a defect in the drivers.
Should this bug be closed and a bug report be filed to nvidia?
Comment 6 nfxjfg 2011-07-03 11:40:19 UTC 
Is there a known workaround for this? nvidia drivers 275.09.07 still have this problem, and software is starting to have hard dependencies on cairo newer than 1.8.
Comment 7 wbrana 2011-07-04 00:29:36 UTC 
Created attachment 48732 [details] [review]
patch

Distros are already using this patch.
Comment 8 nfxjfg 2013-06-02 10:44:26 UTC 
I'm still having this problem.

I guess you don't care about your users?
Comment 9 nfxjfg 2013-06-02 10:46:32 UTC 
Reopening because 1. obviously it's not going to fix itself, and 2. to generate attention to this bug.
Comment 10 Chris Wilson 2013-06-02 10:56:08 UTC 
It is not a bug in cairo though.

cairo-1.8.8:
GtkEntry - time:  0.00
GtkComboBox - time:  0.67
GtkComboBoxEntry - time:  0.49
GtkSpinButton - time:  0.07
GtkProgressBar - time:  0.03
GtkToggleButton - time:  0.07
GtkCheckButton - time:  0.07
GtkRadioButton - time:  0.13
GtkTextView - Add text - time:  0.42
GtkTextView - Scroll - time:  0.13
GtkDrawingArea - Lines - time:  0.70
GtkDrawingArea - Circles - time:  0.68
GtkDrawingArea - Text - time:  0.44
GtkDrawingArea - Pixbufs - time:  0.03
 --- 
Total time:  3.93

cairo-1.12.14:
GtkEntry - time:  0.00
GtkComboBox - time:  0.76
GtkComboBoxEntry - time:  0.48
GtkSpinButton - time:  0.07
GtkProgressBar - time:  0.03
GtkToggleButton - time:  0.07
GtkCheckButton - time:  0.07
GtkRadioButton - time:  0.11
GtkTextView - Add text - time:  0.43
GtkTextView - Scroll - time:  0.13
GtkDrawingArea - Lines - time:  0.73
GtkDrawingArea - Circles - time:  0.69
GtkDrawingArea - Text - time:  0.37
GtkDrawingArea - Pixbufs - time:  0.03
 --- 
Total time:  3.97

Complaining here about a bug in the nvidia driver which is meant to have been fixed last year is not going to help.

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