Re:TodoMVC in Rust
by flohofwoe on Wednesday September 23, 2015 @10:18AM
(#10265108)
I had to check and the generated .js file is 248kByte compressed, 787kByte uncompressed. That's in the same ballpark as a comparable C++ demo, looking at the code it is even a bit big (e.g. my emscripten demos here are between 100kByte and 500kbyte: http://floooh.github.io/oryol/).
There is some inherent size overhead because the linked parts of the C runtime library and C++ std lib are part of the emscripten-generated JS (std::iostream and printf seem to be the biggest offenders on the C++ and C side) while on some native platforms this code lives in DLLs, but gzipped asm.js code itself isn't bigger than its gzipped 'native equivalent' (usually within +/- 10%).
It is easy to created bloated code with emscripten, especially when using C++ instead of C, but for the same reasons the code would also be bloated as native executable (e.g. massive use of template and inline code).
There is some inherent size overhead because the linked parts of the C runtime library and C++ std lib are part of the emscripten-generated JS (std::iostream and printf seem to be the biggest offenders on the C++ and C side) while on some native platforms this code lives in DLLs, but gzipped asm.js code itself isn't bigger than its gzipped 'native equivalent' (usually within +/- 10%).
It is easy to created bloated code with emscripten, especially when using C++ instead of C, but for the same reasons the code would also be bloated as native executable (e.g. massive use of template and inline code).