vga1 at pci1 dev 5 function 0 "ATI Radeon X1250" rev 0x00 The default AccelMethod is apparently still XAA (even though it says it's "unsupported" and to "please use EXA instead"). Since this is an IGP, the optimal MigrationHeuristic is probably "never", but "greedy" seems to be the best approximation :-) I'm sure it's totally different on a real video card...
Some gtkperf results: OpenBSD snap, XAA GtkEntry - time: 1.05 GtkComboBox - time: 14.38 GtkComboBoxEntry - time: 14.16 GtkSpinButton - time: 1.82 GtkProgressBar - time: 1.72 GtkToggleButton - time: 8.07 GtkCheckButton - time: 4.00 GtkRadioButton - time: 5.81 GtkTextView - Add text - time: 50.76 GtkTextView - Scroll - time: 27.31 GtkDrawingArea - Lines - time: 4.06 GtkDrawingArea - Circles - time: 8.09 GtkDrawingArea - Text - time: 48.73 GtkDrawingArea - Pixbufs - time: 24.44 --- Total time: 214.41 OpenBSD snap, EXA greedy GtkEntry - time: 0.91 GtkComboBox - time: 23.54 GtkComboBoxEntry - time: 21.88 GtkSpinButton - time: 2.15 GtkProgressBar - time: 1.33 GtkToggleButton - time: 10.29 GtkCheckButton - time: 7.81 GtkRadioButton - time: 12.83 GtkTextView - Add text - time: 39.62 GtkTextView - Scroll - time: 29.69 GtkDrawingArea - Lines - time: 15.66 GtkDrawingArea - Circles - time: 7.96 GtkDrawingArea - Text - time: 48.49 GtkDrawingArea - Pixbufs - time: 25.19 --- Total time: 247.35 OpenBSD snap, EXA smart GtkEntry - time: 0.96 GtkComboBox - time: 31.70 GtkComboBoxEntry - time: 29.09 GtkSpinButton - time: 1.03 GtkProgressBar - time: 1.81 GtkToggleButton - time: 6.67 GtkCheckButton - time: 5.59 GtkRadioButton - time: 27.78 GtkTextView - Add text - time: 158.68 GtkTextView - Scroll - time: 142.15 GtkDrawingArea - Lines - time: 15.92 GtkDrawingArea - Circles - time: 7.88 GtkDrawingArea - Text - time: 49.97 GtkDrawingArea - Pixbufs - time: 40.37 --- Total time: 519.62 OpenBSD snap, EXA always GtkEntry - time: 3.60 GtkComboBox - time: 61.66 GtkComboBoxEntry - time: 62.06 GtkSpinButton - time: 4.07 GtkProgressBar - time: 5.04 GtkToggleButton - time: 18.20 GtkCheckButton - time: 18.02 GtkRadioButton - time: 25.31 GtkTextView - Add text - time: 132.26 GtkTextView - Scroll - time: 109.36 GtkDrawingArea - Lines - time: 15.13 GtkDrawingArea - Circles - time: 7.86 GtkDrawingArea - Text - time: 49.74 GtkDrawingArea - Pixbufs - time: 34.67 --- Total time: 546.98 FreeBSD 7.0-RELEASE (xf86-video-ati from git), XAA GtkEntry - time: 0.14 GtkComboBox - time: 6.78 GtkComboBoxEntry - time: 6.31 GtkSpinButton - time: 0.36 GtkProgressBar - time: 0.19 GtkToggleButton - time: 2.66 GtkCheckButton - time: 2.05 GtkRadioButton - time: 3.09 GtkTextView - Add text - time: 33.46 GtkTextView - Scroll - time: 18.44 GtkDrawingArea - Lines - time: 3.01 GtkDrawingArea - Circles - time: 6.94 GtkDrawingArea - Text - time: 38.08 GtkDrawingArea - Pixbufs - time: 4.22 --- Total time: 125.74 FreeBSD 7.0-RELEASE (xf86-video-ati from git), EXA greedy GtkEntry - time: 0.14 GtkComboBox - time: 4.40 GtkComboBoxEntry - time: 4.19 GtkSpinButton - time: 0.36 GtkProgressBar - time: 0.20 GtkToggleButton - time: 1.17 GtkCheckButton - time: 0.67 GtkRadioButton - time: 1.47 GtkTextView - Add text - time: 25.29 GtkTextView - Scroll - time: 19.34 GtkDrawingArea - Lines - time: 8.28 GtkDrawingArea - Circles - time: 6.67 GtkDrawingArea - Text - time: 36.05 GtkDrawingArea - Pixbufs - time: 4.53 --- Total time: 112.78 FreeBSD 7.0-RELEASE (xf86-video-ati from git), EXA smart GtkEntry - time: 1.03 GtkComboBox - time: 23.87 GtkComboBoxEntry - time: 34.06 GtkSpinButton - time: 0.46 GtkProgressBar - time: 2.18 GtkToggleButton - time: 16.93 GtkCheckButton - time: 18.98 GtkRadioButton - time: 25.39 GtkTextView - Add text - time: 47.99 GtkTextView - Scroll - time: 23.78 GtkDrawingArea - Lines - time: 8.34 GtkDrawingArea - Circles - time: 6.69 GtkDrawingArea - Text - time: 37.33 GtkDrawingArea - Pixbufs - time: 14.53 --- Total time: 261.60 FreeBSD 7.0-RELEASE (xf86-video-ati from git), EXA always GtkEntry - time: 1.58 GtkComboBox - time: 44.06 GtkComboBoxEntry - time: 47.28 GtkSpinButton - time: 2.08 GtkProgressBar - time: 2.15 GtkToggleButton - time: 17.31 GtkCheckButton - time: 18.09 GtkRadioButton - time: 24.87 GtkTextView - Add text - time: 49.21 GtkTextView - Scroll - time: 23.11 GtkDrawingArea - Lines - time: 8.34 GtkDrawingArea - Circles - time: 6.69 GtkDrawingArea - Text - time: 36.57 GtkDrawingArea - Pixbufs - time: 13.77 --- Total time: 295.11