Exact

Exact Union RegExp

Gregory P. Smith c67d3db69e [3.14] gh-160310: Fix quadratic one-shot decompress() with many members (GH-160311) (#161038) ... gzip.decompress(), bz2.decompress(), lzma.decompress() and compression.zstd.decompress() handed each new decompressor all of the remaining input and copied the rest back through unused_data, so input made of many concatenated members took quadratic time. Each member is now fed in chunks that start at 1 KiB and double, and the loop steps back over unused_data by offset. The first chunk is the whole input, so single-member data still takes one decompressor call. bz2, lzma and zstd share the loop through a private helper in compression._common._streams; gzip keeps its own because it parses the member header, trailer and padding itself. ANT-2026-9R8SO5S2 (cherry picked from commit e80962a4bd)		2026-10-31 22:46:32 +00:00
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__init__.py
_streams.py	[3.14] gh-160310: Fix quadratic one-shot decompress() with many members (GH-160311) (#161038)	2026-10-31 22:46:32 +00:00