From d9b2de7ce9161f902a6b6145d9d60a8d492d4959 Mon Sep 17 00:00:00 2001
From: Marco Heinemann <marco.heinemann@useblocks.com>
Date: Mon, 22 Jan 2024 09:32:25 +0100
Subject: [PATCH] Fix typo

---
 doc/usage/configuration.rst | 2 +-
 sphinx/testing/fixtures.py  | 2 ++
 sphinx/testing/util.py      | 4 ++--
 sphinx/util/parallel.py     | 2 +-
 tox.ini                     | 2 +-
 5 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/doc/usage/configuration.rst b/doc/usage/configuration.rst
index 8d93805f49e..b66d0553be3 100644
--- a/doc/usage/configuration.rst
+++ b/doc/usage/configuration.rst
@@ -795,7 +795,7 @@ General configuration
    the parallel write phase. When active, the event :event:`doctree-resolved` as
    well as the builder function ``write_doc_serialized`` also run in parallel.
    Parallel post-transformation can greatly improve build time for extensions that
-   do heave computation in that phase. Depending on machine core count and project
+   do heavy computation in that phase. Depending on machine core count and project
    size, a build time reduction by a factor of 2 to 4 and even more was observed.
    The feature flag does nothing in case parallel writing is not used.
 
diff --git a/sphinx/testing/fixtures.py b/sphinx/testing/fixtures.py
index a62f34694b7..c6d4fbb7c31 100644
--- a/sphinx/testing/fixtures.py
+++ b/sphinx/testing/fixtures.py
@@ -145,6 +145,7 @@ def app(
     """
     args, kwargs = app_params
     app_ = make_app(*args, **kwargs)
+    app_.env.config.enable_parallel_post_transform = True
     yield app_
 
     print('# testroot:', kwargs.get('testroot', 'root'))
@@ -189,6 +190,7 @@ def make(*args: Any, **kwargs: Any) -> SphinxTestApp:
         kwargs.setdefault('status', status)
         kwargs.setdefault('warning', warning)
         app_: Any = SphinxTestApp(*args, **kwargs)
+        # app_.env.config.enable_parallel_post_transform = True
         apps.append(app_)
         if test_params['shared_result']:
             app_ = SphinxTestAppWrapperForSkipBuilding(app_)
diff --git a/sphinx/testing/util.py b/sphinx/testing/util.py
index e15a43b4b33..c81f8274532 100644
--- a/sphinx/testing/util.py
+++ b/sphinx/testing/util.py
@@ -91,8 +91,8 @@ def __init__(
         status: IO | None = None,
         warning: IO | None = None,
         tags: list[str] | None = None,
-        docutils_conf: str | None = None,
-        parallel: int = 0,
+        docutilsconf: str | None = None,
+        parallel: int = 4,
     ) -> None:
         assert srcdir is not None
 
diff --git a/sphinx/util/parallel.py b/sphinx/util/parallel.py
index 10f8c8945af..6b8ce39997d 100644
--- a/sphinx/util/parallel.py
+++ b/sphinx/util/parallel.py
@@ -149,7 +149,7 @@ def make_chunks(arguments: Sequence[str], nproc: int, maxbatch: int = 10) -> lis
     chunksize = nargs // nproc
     if chunksize >= maxbatch:
         # try to improve batch size vs. number of batches
-        chunksize = int(sqrt(nargs / nproc * maxbatch))
+        chunksize = int(sqrt(sqrt(nargs / nproc * maxbatch)))
     if chunksize == 0:
         chunksize = 1
     nchunks, rest = divmod(nargs, chunksize)
diff --git a/tox.ini b/tox.ini
index fb7e344ff0b..28632ae6508 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,7 +24,7 @@ setenv =
     PYTHONWARNINGS = error
     PYTEST_ADDOPTS = {env:PYTEST_ADDOPTS:} --color yes
 commands=
-    python -X dev -X warn_default_encoding -m pytest --durations 25 {posargs}
+    python -X dev -X warn_default_encoding -m pytest -n 4 --durations 25 {posargs}
 
 [testenv:docs]
 basepython = python3