From b4fe02f595fcb9f78261920a268ef614821ec195 Mon Sep 17 00:00:00 2001
From: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
Date: Wed, 3 Apr 2024 15:24:24 -0700
Subject: [PATCH] gh-117205: Increase chunksize when compiling pyc in parallel
 (#117206)

---
 Lib/compileall.py                                              | 3 ++-
 .../Library/2024-03-25-00-20-16.gh-issue-117205.yV7xGb.rst     | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2024-03-25-00-20-16.gh-issue-117205.yV7xGb.rst

diff --git a/Lib/compileall.py b/Lib/compileall.py
index 9b53086bf41..47e2446356e 100644
--- 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
index 00000000000..8d8c201afd2
--- /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``.