Flash :: Custom DEFLATE Implementation To Speed Up PNG Encoding
Jun 13, 2011
I'm optimizing a PNG encoder for use within Flash SWFs (but I'm writing it in HaXe).I've so far managed to speed things up a fair bit, mostly by using speedy memory read/writes.While profiling my code, I noticed that about 75% of the time is spent in a single call to Flash's built-in compress() method, which uses the zlib algorithm (which uses DEFLATE in turn).I'm not too fussy about compression ratio, but faster compression would be awesome. So, I was wondering if it's worthwhile to try to implement zlib/DEFLATE myself. A little searching has turned up the zlibC.implementation source, but it's not exactly light reading (or easy to port!).Are there any simple implementations of zlib/DEFLATE that I could use as a starting point? I'd rather not have to wade through the two specs, especially since I don't know whether an implementation running in AVM2 could even perform as fast as the native Flash one in the first place.
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[Code]...
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