Add profiling to xrange update loop

piker/ui/_interaction.py

@@ -37,6 +37,7 @@ from ..log import get_logger
 from ._style import _min_points_to_show
 from ._editors import SelectRect
 from . import _event
+from .._profile import pg_profile_enabled, ms_slower_then
 # from ._ohlc import BarItems
 
 
@@ -862,10 +863,16 @@ class ChartView(ViewBox):
         chart = self._chart
         # graphics = list(self._chart._graphics.values())
 
+        profiler = pg.debug.Profiler(
+            msg=f'FastAppendCurve.update_from_array(): `{chart.name}`',
+            disabled=not pg_profile_enabled(),
+            gt=ms_slower_then,
+        )
         for name, graphics in chart._graphics.items():
             # pass in no array which will read and render from the last
             # passed array (normally provided by the display loop.)
             chart.update_graphics_from_array(name)
+            profiler(f'updating {name}')
 
         # for graphic in graphics:
         #     ds_meth = getattr(graphic, 'maybe_downsample', None)