gh-117205: Increase chunksize when compiling pyc in parallel (#117206)

diff --git a/Lib/compileall.py b/Lib/compileall.py
index 9b53086bf41380ea6d1e0f3348c77fc29f3dbdac..47e2446356e7d7dd73c163ef6f28d660545ac6c4 100644 (file)
--- a/Lib/compileall.py
+++ b/Lib/compileall.py
@@ -116,7 +116,8 @@ def compile_dir(dir, maxlevels=None, ddir=None, force=False,
                                            prependdir=prependdir,
                                            limit_sl_dest=limit_sl_dest,
                                            hardlink_dupes=hardlink_dupes),
-                                   files)
+                                   files,
+                                   chunksize=4)
             success = min(results, default=True)
     else:
         for file in files:

diff --git a/Misc/NEWS.d/next/Library/2024-03-25-00-20-16.gh-issue-117205.yV7xGb.rst b/Misc/NEWS.d/next/Library/2024-03-25-00-20-16.gh-issue-117205.yV7xGb.rst
new file mode 100644 (file)
index 0000000..8d8c201
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-03-25-00-20-16.gh-issue-117205.yV7xGb.rst
@@ -0,0 +1 @@
+Speed up :func:`compileall.compile_dir` by 20% when using multiprocessing by increasing ``chunksize``.