Default async rendering to True

Author: Archmonger

docs/source/about/changelog.rst

@@ -59,6 +59,7 @@ Unreleased
 - :pull:`1281` - ``reactpy.core.vdom._EllipsisRepr`` has been moved to ``reactpy.types.EllipsisRepr``.
 - :pull:`1281` - ``reactpy.types.VdomDictConstructor`` has been renamed to ``reactpy.types.VdomConstructor``.
 - :pull:`1312` - ``REACTPY_ASYNC_RENDERING`` can now de-duplicate and cascade renders where necessary.
+- :pull:`1312` - ``REACTPY_ASYNC_RENDERING`` is now defaulted to ``True`` for up to 40x performance improvements.
 
 **Deprecated**
 

src/reactpy/config.py

@@ -85,7 +85,7 @@ def boolean(value: str | bool | int) -> bool:
 
 REACTPY_ASYNC_RENDERING = Option(
     "REACTPY_ASYNC_RENDERING",
-    default=False,
+    default=True,
     mutable=True,
     validator=boolean,
 )