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gh-89550: Buffer GzipFile.write to reduce execution time by ~15% #101251

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Merged
gpshead merged 17 commits into from
May 8, 2023
Merged

gh-89550: Buffer GzipFile.write to reduce execution time by ~15% #101251

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943ca9c
initial testing to see if it's faster
CCLDArjun Jan 22, 2023
6f4701b
Merge branch 'python:main' into buffered-gzip-writes
CCLDArjun Jan 22, 2023
8653faf
use io.BufferedWriter to buffer gzip writes
CCLDArjun Jan 22, 2023
1c36625
:Merge branch 'buffered-gzip-writes' of https://github.com/ccldarjun/…
CCLDArjun Jan 22, 2023
bc4d929
news blurb
CCLDArjun Jan 22, 2023
ef9dd50
Merge branch 'main' into buffered-gzip-writes
CCLDArjun Jan 26, 2023
b3aa1f7
added buffer_size for file writes
CCLDArjun Feb 18, 2023
ad2dc9b
:Merge branch 'buffered-gzip-writes' of https://github.com/ccldarjun/…
CCLDArjun Feb 18, 2023
a929ac8
comment for _write_raw
CCLDArjun Feb 18, 2023
d1618f2
common DEFAULT_WRITE_BUFFER_SIZE
CCLDArjun Feb 18, 2023
a7efd1b
Merge branch 'main' into buffered-gzip-writes
CCLDArjun Feb 18, 2023
d0da047
Merge branch 'main' into buffered-gzip-writes
CCLDArjun Feb 22, 2023
fe31588
use constant for write buffer size
CCLDArjun Feb 23, 2023
875ebd8
Merge branch 'main' into buffered-gzip-writes
CCLDArjun Apr 24, 2023
e33fc19
Merge branch 'main' into buffered-gzip-writes
AlexWaygood May 8, 2023
5ef4674
improve news wording and ReSTify
gpshead May 8, 2023
c0f3d2a
Merge branch 'main' into buffered-gzip-writes
gpshead May 8, 2023
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common DEFAULT_WRITE_BUFFER_SIZE
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@CCLDArjun
CCLDArjun committed Feb 18, 2023
commit d1618f26050f3a5abcca8625a1aa85fa2beaed6e
6 changes: 4 additions & 2 deletions Lib/gzip.py
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Original file line number Diff line number Diff line change
Expand Up @@ -22,10 +22,12 @@
_COMPRESS_LEVEL_BEST = 9

READ_BUFFER_SIZE = 128 * 1024
DEFAULT_WRITE_BUFFER_SIZE = 4 * io.DEFAULT_BUFFER_SIZE


def open(filename, mode="rb", compresslevel=_COMPRESS_LEVEL_BEST,
encoding=None, errors=None, newline=None, buffer_size=4*io.DEFAULT_BUFFER_SIZE):
encoding=None, errors=None, newline=None,
buffer_size=DEFAULT_WRITE_BUFFER_SIZE):
"""Open a gzip-compressed file in binary or text mode.

The filename argument can be an actual filename (a str or bytes object), or
Expand Down Expand Up @@ -150,7 +152,7 @@ class GzipFile(_compression.BaseStream):

def __init__(self, filename=None, mode=None,
compresslevel=_COMPRESS_LEVEL_BEST, fileobj=None, mtime=None,
buffer_size=4*io.DEFAULT_BUFFER_SIZE):
buffer_size=DEFAULT_WRITE_BUFFER_SIZE):
"""Constructor for the GzipFile class.

At least one of fileobj and filename must be given a
Expand Down