diff options
| -rw-r--r-- | Doc/library/shutil.rst | 2 | ||||
| -rw-r--r-- | Lib/shutil.py | 2 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Library/2019-03-01-16-10-01.bpo-36103.n6VgXL.rst | 3 |
3 files changed, 5 insertions, 2 deletions
diff --git a/Doc/library/shutil.rst b/Doc/library/shutil.rst index 79d6bd4..587be3b 100644 --- a/Doc/library/shutil.rst +++ b/Doc/library/shutil.rst @@ -424,7 +424,7 @@ On Linux, Solaris and other POSIX platforms where :func:`os.sendfile` supports copies between 2 regular file descriptors :func:`os.sendfile` is used. On Windows :func:`shutil.copyfile` uses a bigger default buffer size (1 MiB -instead of 16 KiB) and a :func:`memoryview`-based variant of +instead of 64 KiB) and a :func:`memoryview`-based variant of :func:`shutil.copyfileobj` is used. If the fast-copy operation fails and no data was written in the destination diff --git a/Lib/shutil.py b/Lib/shutil.py index 9b50c2a..7dd470d 100644 --- a/Lib/shutil.py +++ b/Lib/shutil.py @@ -49,7 +49,7 @@ if os.name == 'posix': elif _WINDOWS: import nt -COPY_BUFSIZE = 1024 * 1024 if _WINDOWS else 16 * 1024 +COPY_BUFSIZE = 1024 * 1024 if _WINDOWS else 64 * 1024 _HAS_SENDFILE = posix and hasattr(os, "sendfile") _HAS_FCOPYFILE = posix and hasattr(posix, "_fcopyfile") # macOS diff --git a/Misc/NEWS.d/next/Library/2019-03-01-16-10-01.bpo-36103.n6VgXL.rst b/Misc/NEWS.d/next/Library/2019-03-01-16-10-01.bpo-36103.n6VgXL.rst new file mode 100644 index 0000000..97ed658 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2019-03-01-16-10-01.bpo-36103.n6VgXL.rst @@ -0,0 +1,3 @@ +Default buffer size used by ``shutil.copyfileobj()`` is changed from 16 KiB +to 64 KiB on non-Windows platform to reduce system call overhead. Contributed +by INADA Naoki. |