Run sphinx in multiprocess

Author: miyakogi

Makefile

@@ -81,7 +81,7 @@ pydocstyle:  ## run pydocstyle check
 docs:  ## build document
 	@echo "Sphinx build start."
 	@cd docs && \
-	sphinx-build -q -E -W -b html . _build/html && \
+	sphinx-build -q -E -W -j 4 -b html . _build/html && \
 	cd ../
 	@echo "Sphinx build done."
 

dodo.py

@@ -38,7 +38,7 @@ def task_pydocstyle():
 def task_docs():
     """Build sphinx document."""
     return {
-        'actions': ['sphinx-build -q -W -E -b html docs docs/_build/html'],
+        'actions': ['sphinx-build -q -W -E -j 4 -b html docs docs/_build/html'],
     }