Improve settings app performance

modules/app_components/layout.py

@@ -1,5 +1,6 @@
 from events.input import BUTTON_TYPES
 from . import tokens, utils
+from perf_timer import PerfTimer
 
 
 class Layoutable:
@@ -84,6 +85,9 @@ def __init__(self, label, value, button_handler=None):
         self.height = 0
         self.button_handler = button_handler
 
+    def __repr__(self):
+        return f"<DefinitionDisplay {self.label}={self.value}>"
+
     async def button_event(self, event):
         if self.button_handler:
             return await self.button_handler(event)
@@ -146,11 +150,32 @@ def draw(self, ctx):
         ctx.scale(self.scale_factor, self.scale_factor)
         ctx.translate(12, 0)
 
-        # Draw each item in turn
-        for item in self.items:
-            item.draw(ctx, focused=item == focused_child)
-            ctx.translate(0, item.height)
-            self.height += item.height
+        with PerfTimer("Layout draw"):
+            # Draw each item in turn
+            draw_progressive = True
+            progressive_y = progressive_y_last = 120
+            for item in self.items:
+                if draw_progressive:
+                    if item.height:
+                        progressive_y -= item.height
+                    else:
+                        draw_progressive = False
+                        item.draw(ctx, focused=item == focused_child)
+
+                    if progressive_y_last < (self.y_offset + 150) and progressive_y > (
+                        self.y_offset - 300
+                    ):
+                        with PerfTimer(f"Draw element {item}"):
+                            item.draw(ctx, focused=item == focused_child)
+                    else:
+                        # item.draw(ctx, focused=item == focused_child)
+                        pass  # print("Skipping draw of ", item, progressive_y_last, self.y_offset, progressive_y)
+
+                    progressive_y_last = progressive_y
+                else:
+                    item.draw(ctx, focused=item == focused_child)
+                ctx.translate(0, item.height)
+                self.height += item.height
 
         ctx.restore()
 

modules/app_components/utils.py

@@ -1,6 +1,8 @@
 from os import stat
+import micropython
 
 
+@micropython.native
 def fill_line(ctx, text, font_size, width_for_line):
     ctx.save()
     ctx.font_size = font_size
@@ -29,6 +31,7 @@ def fill_line(ctx, text, font_size, width_for_line):
     return lines
 
 
+@micropython.native
 def wrap_text(ctx, text, font_size=None, width=None):
     if width is None:
         width = 240

modules/firmware_apps/settings_app.py

@@ -111,7 +111,7 @@ async def run(self, render_update):
             self.layout.items = []
             for id, label, formatter, editor in self.settings_options():
                 value = settings.get(id)
-                print(editor)
+
                 if editor:
 
                     async def _button_event(event, label=label, id=id, editor=editor):
@@ -220,8 +220,8 @@ async def _button_event_w(event):
                 await render_update()
                 current_time = time.ticks_ms()
                 self.update(current_time - previous_time)
-                if self.ctx:
-                    self.draw(self.ctx)
+                # if self.ctx:
+                #    self.draw(self.ctx)
                 if self.dialog:
                     result = await self.dialog.run(render_update)
                     if (

modules/system/scheduler/__init__.py

@@ -227,7 +227,8 @@ async def _render_task(self):
                                 )
                             )
                         ctx.restore()
-                display.end_frame(ctx)
+                with PerfTimer("End frame"):
+                    display.end_frame(ctx)
             await asyncio.sleep(0)
 
     async def _main(self):

sim/fakes/micropython.py

@@ -0,0 +1,2 @@
+def native(func):
+    return func