BETTERZIP BREW APK

> but the impact at runtime should be evaluated (in terms of RSS and startup > Note that increasing the chunk size to 32k gets the size down to 21908326, > a dictionary, libxul.so would be 22665452 instead of 22444612 in that apk. > 7z's deflate doesn't take a dictionary, which *does* help a little: without > some amount off libxul.so by using 7z's deflate instead of zlib's, but iirc, > more considering it's compressed in chunks. > tricks, but yes, it's kind of expected that it's possible to compress it > libxul.so can't be compressed, it's already compressed in chunks, using some > So the bulk of the difference is libxul.so, omni.ja and x, > for f, n in sorted(ems(), key=lambda x: x, reverse=True): > new = dict(JarReader('gecko-unsigned-unaligned.apk').entries) > orig = dict(JarReader('gecko-unsigned-unaligned-orig.apk').entries) Spending 6 minutes for 67498 bytes seems overkill. So, I took it for a spin on last nightly's gecko-unsigned-unaligned.apk.Д¬ompressed with advzip -recompress -k -4 -iter 50 gecko-unsigned-unaligned.apk: 38434380 (and that took 6 minutes on my machine)Д¬ompressed with advzip -recompress -k -3 gecko-unsigned-unaligned.apk (presumably equivalent to using 7z): 38501878.

BETTERZIP BREW APK

Those files are the bulk of the APK (15MB for libxul, 6MB for omni.ja, 6MB for x), so perhaps this is indication that we're leaving a lot of savings on the table thereвЂ¦. Presumably that's to allow our own seeking magic?

Maybe you can try again with those excluded. > We don't compress some stuff on purpose like lib*.so, omni.ja, and I'd be very happy for someone to repeat this experiment with another suitable compression tool. It was the obvious search result that had an implementation of Zopfli (which is very very slow but typically beats everything else in output size) and could do in-place recompression. > Why use advzip (never heard of it until now) instead of 7z (that we likely (In reply to Mike Hommey from comment #6) Yeah, I wouldn't expect this to run on every push. adding 5 minutes to the builds is not very nice, though. (In reply to Mike Hommey from comment #7)

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