* lossless performance and compression improvements + a new 'cruncher' mode (-m 6 -q 100) * ARM performance improvements with clang (15-20% w/ndk r15c) * webp-js: emscripten/webassembly based javascript decoder * miscellaneous bug & build fixes
Note that there are two Godot-specific changes made to libwebp for the javascript/HTML5 platform. They are documented in the README.md.