Enable parallel type checking for mypy (#170381)

.github/workflows/ci.yaml

@@ -853,7 +853,7 @@ jobs:
         run: |
           . venv/bin/activate
           python --version
-          mypy homeassistant pylint
+          mypy --num-workers=4 homeassistant pylint
       - name: Run mypy (partially)
         if: needs.info.outputs.test_full_suite == 'false'
         shell: bash
@@ -862,7 +862,7 @@ jobs:
         run: |
           . venv/bin/activate
           python --version
-          mypy $(printf "homeassistant/components/%s " ${INTEGRATIONS_GLOB})
+          mypy --num-workers=4 $(printf "homeassistant/components/%s " ${INTEGRATIONS_GLOB})
 
   prepare-pytest-full:
     name: Split tests for full run

mypy.ini

@@ -8,6 +8,8 @@ platform = linux
 plugins = pydantic.mypy
 show_error_codes = true
 follow_imports = normal
+native_parser = true
+num_workers = 2
 local_partial_types = true
 strict_equality = true
 strict_bytes = true

script/hassfest/mypy_config.py

@@ -38,6 +38,8 @@ GENERAL_SETTINGS: Final[dict[str, str]] = {
     ),
     "show_error_codes": "true",
     "follow_imports": "normal",
+    "native_parser": "true",
+    "num_workers": "2",  # Use a conservative value here
     # "enable_incomplete_feature": ", ".join(
     #     []
     # ),