From 7956ef884965ac6f9f7f2a27b835ea80e471c886 Mon Sep 17 00:00:00 2001 From: Ruben Vorderman Date: Fri, 26 Feb 2021 13:17:51 +0100 Subject: bpo-43317: Use io.DEFAULT_BUFFER_SIZE instead of 1024 in gzip CLI (#24645) This improves the performance slightly. --- Lib/gzip.py | 2 +- Misc/NEWS.d/next/Library/2021-02-25-09-08-55.bpo-43317.qrOOpB.rst | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) create mode 100644 Misc/NEWS.d/next/Library/2021-02-25-09-08-55.bpo-43317.qrOOpB.rst diff --git a/Lib/gzip.py b/Lib/gzip.py index ee0cbed..1369157 100644 --- a/Lib/gzip.py +++ b/Lib/gzip.py @@ -595,7 +595,7 @@ def main(): f = builtins.open(arg, "rb") g = open(arg + ".gz", "wb") while True: - chunk = f.read(1024) + chunk = f.read(io.DEFAULT_BUFFER_SIZE) if not chunk: break g.write(chunk) diff --git a/Misc/NEWS.d/next/Library/2021-02-25-09-08-55.bpo-43317.qrOOpB.rst b/Misc/NEWS.d/next/Library/2021-02-25-09-08-55.bpo-43317.qrOOpB.rst new file mode 100644 index 0000000..01ff48a --- /dev/null +++ b/Misc/NEWS.d/next/Library/2021-02-25-09-08-55.bpo-43317.qrOOpB.rst @@ -0,0 +1,3 @@ +Set the chunk size for the ``gzip`` module main function to +io.DEFAULT_BUFFER_SIZE. This is slightly faster than the 1024 bytes constant +that was used previously. -- cgit v0.12