On Thu, 2005-06-09 at 10:49 -0400, Luis Villa wrote: > On 6/9/05, Luis Villa <luis villa gmail com> wrote: > Went ahead and did it myself. TextView is brutally slower (300-400%), > some other things are 25-30% slower, and some things actually get > faster. Disclaimer: I'm pretty sure I did this right and I'm linking > against the right stuff, but these numbers should be confirmed by an > expert, and I can't speak to the validity of the tool's measurements > itself, except to note that scrolling in a textview area is *visibly* > slower. > > The data: > > first 'column' of times is gtk 2.6, second is gtk/cairo HEAD of > yesterday, both with the Mist theme: With the Mist theme, you are testing mixed Cairo and GDK rendering. Right now, that could conceivably hide some performance problems with Cairo. In the future, there are some performance optimizations that will be disabled when you are mixing Cairo and GDK rendering. The GTK+ builtin theme probably gives more of an accurate feel for GTK+/Cairo performance. What the appropriate theme to test is does depend on what we will be shipping for GNOME-2.10 as the default, of course. Which is likely not the GTK+ builtin theme. > GtkEntry - time: 0.43 0.76 > GtkComboBox - time: 12.61 15.30 > GtkComboBoxEntry - time: 11.95 13.25 > GtkSpinButton - time: 0.65 1.09 > GtkProgressBar - time: 0.53 0.87 > GtkToggleButton - time: 2.17 4.42 > GtkCheckButton - time: 3.41 3.27 > GtkRadioButton - time: 4.29 3.96 > GtkTextView - Add text - time: 91.88 268.67 > GtkTextView - Scroll - time: 43.17 190.83 > GtkDrawingArea - Lines - time: 8.40 8.48 > GtkDrawingArea - Circles - time: 13.38 13.58 > GtkDrawingArea - Text - time: 48.70 29.99 > GtkDrawingArea - Pixbufs - time: 11.71 11.46 Without studying what these benchmarks are actually doing, I'd consider them pretty encouraging ... some operations got faster, and what got slower is something we have in our sights already ... cairo_scaled_font_glyph_extents(). (GtkTextView performance is text measuring performance.) There is an obvious big-hammer approach that would allow us to get rid of that ... to put a cache in front of it so that we avoid calling into Cairo entirely, but I'd like to see what we can do inside of Cairo first. Regards, Owen
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