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License: GNU General Public License v2.0
PNG encoder/decoder
License: GNU General Public License v2.0
I think these are the main bottlenecks:
_get_symbol_info
. I think we probably want to make a dictionary mapping every possible length/distance directly to the LengthSymbolInfo.I wanted to make slidingwindow support streaming data, but had trouble getting it to be performant. I think this line is the issue:
outf.write(bytes(itertools.islice(self.deque, self.idx, self.idx + n)))
Deques are not optimized for sequential accesses, so this decimates performance. The solution would probably be to have a bytearray and be smart about moving data in and out in sufficiently large chunks.
We should either implement this, or remove the slow slidingwindow.
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