"Big web app? Compile it (To Javascript)" would be a better title. The presentation is confined to cross-compiling languages (C, C++, Java, Ruby, Lua, etc) to

"Big web app? Compile it (To Javascript)" would be a better title. The presentation is confined to cross-compiling languages (C, C++, Java, Ruby, Lua, etc) to javascript and asm.js. The last ten, or so, slides actually has some content about the trade offs. My personal opinion is that most of the benefits from "compiling to asm.js" seem to be just removing the JS dynamic types and applying known compiler optimizations.