Cannot find PDF for Slim Binaries paper by Franz, so I cite it from memory. They used syntax trees of program as a distribution format, compressed these trees

Cannot find PDF for Slim Binaries paper by Franz, so I cite it from memory. They used syntax trees of program as a distribution format, compressed these trees with LZW variant and executed using simple JIT compiler (basically, tree automata over program trees). The size of Slim Binaries was smaller than JAR files for comparable Java programs. I don't remember exact percentage reduction, it was about 20-40, I believe.