rate.py: update ESP32 benchmark result.

peterhinch · peterhinch · commit b94b15117cbd · 2022-02-08T10:03:32.000Z
diff --git a/v3/as_demos/rate.py b/v3/as_demos/rate.py
@@ -10,9 +10,13 @@
 # Results for 100 coros on other platforms at standard clock rate:
 # Pyboard D SF2W 124μs
 # Pico 481μs
-# ESP32 920μs
+# ESP32 322μs
 # ESP8266 1495μs (could not run 500 or 1000 coros)
 
+# Note that ESP32 benchmarks are notoriously fickle. Above figure was for
+# the reference board running MP V1.18. Results may vary with firmware
+# depending on the layout of code in RAM/IRAM
+
 import uasyncio as asyncio
 
 num_coros = (100, 200, 500, 1000)
