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Title: gh-89550: Buffer GzipFile.write to reduce execution time by ~15% by CCLDArjun · Pull Request #101251 · python/cpython · GitHub

Open Graph Title: gh-89550: Buffer GzipFile.write to reduce execution time by ~15% by CCLDArjun · Pull Request #101251 · python/cpython

X Title: gh-89550: Buffer GzipFile.write to reduce execution time by ~15% by CCLDArjun · Pull Request #101251 · python/cpython

Description: Currently, all of this is done for every write() call: https://github.com/python/cpython/blob/main/Lib/gzip.py#L266-L288 This pr stores GzipFile.write() data into a buffer to postpone most of the compression work to when the buffer flushes. This way, we can call into zlib and File.write() less frequently. benchmarking with timeit: ../python -m timeit -s 'import gzip ' 'with gzip.open("./Python-3.11.1.tgz", "rb") as infile: ' ' with gzip.open("./Python-3.11.1new.tgz", "wb") as outfile: ' ' for line in infile: ' ' outfile.write(line) ' ' ' 1 loop, best of 5: 6.36 sec per loop vs ../python -m timeit -s 'import gzipold as gzip ' 'with gzip.open("./Python-3.11.1.tgz", "rb") as infile: ' ' with gzip.open("./Python-3.11.1new.tgz", "wb") as outfile: ' ' for line in infile: ' ' outfile.write(line) ' ' ' 1 loop, best of 5: 7.68 sec per loop Issue: gh-89550

Open Graph Description: Currently, all of this is done for every write() call: https://github.com/python/cpython/blob/main/Lib/gzip.py#L266-L288 This pr stores GzipFile.write() data into a buffer to postpone most of the c...

X Description: Currently, all of this is done for every write() call: https://github.com/python/cpython/blob/main/Lib/gzip.py#L266-L288 This pr stores GzipFile.write() data into a buffer to postpone most of the c...

Opengraph URL: https://github.com/python/cpython/pull/101251

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