Implement zstd compression and PNG optimization - #162
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Loader v5.9.0 added support for unzipping Zstd entries in archives, so the new flags are gated behind target Geode version being v5.9.0 or higher.
mod.jsonis always deflated, so older Geode versions can read metadata in a.geodefile with no problems.The new
--zstdflag applies togeode package new(local builds, intermediary single-platform CI builds) to apply level 3 Zstd compression and togeode package mergeto apply level 18 compression. Level 3 is the default level and is good for development/intermediary artifacts, while level 18 takes a lot more time and is good for release builds.For example, stats for the Globed DLL:
Zstd absolutely stomps the competition by being smaller and faster to compress on low levels. High levels shine with reduced sizes and still blazing fast decompression speeds (level 18 will still be unzipped much faster than regular deflate, so faster mod load times)
On top of that,
oxipngis now used to more efficiently compress.pngfiles in the final merged mod, if the--optimize-pngsflag is passed. This yields pretty significant size improvements yet again, at the cost of taking some extra time (for example Globed resources go from 9.1 MiB to 7.2 MiB). The compression is lossless and has no negative impact on texture load time.