Wanted: A crate that implements a buffered zlib decoder that buffers, say, 32K of uncompressed data by doing the decompression in a separate thread. I think it’d be an easy way to speed up a lot of apps (image decoding, etc.) via pipelining, without much effort.
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Actually I think it might have been the "ZRLE" encoding that some VNC servers prefer, because that combines zLib with other transformations, regular VNC zlib encoding just zlibs the bitmap.
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Ah, OK, that doesn’t sound very CPU intensive then. PNG has that incredibly slow Paeth predictor which takes as long as the zlib decoding even if optimized with SSE4.1…
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It was for decoding zLib compressed image data received on a VNC connection. I'm a little hazy on the details of that specific performance problem, that whole project is a performance problem. :-P
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