DJB said:
Anyone heard of Emscripten?
Emscripten is an LLVM-based project that compiles C and C++ into highly-optimizable JavaScript in asm.js format. This lets you run C and C++ on the web at near-native speed, without plugins.
Compile your existing projects written in C or C++ and run them on all modern browsers.
I have just found it on my lunch break at work, I'm I could have some fun with this. I found it whilst stumbling on:
https://win95.ajf.me/
Yep!.. I think 2 years ago when I started digging into WebGL.
Brendan Eick made few demos of C++ games that were ported (transcompiled with
Emscripten) into JS (as asm.js) in 2 consecutive JSConf (2013 and 2014 if I recall.)
But the first official announcement I think was in this Mozilla Hacks blog post:
Porting "Me & My Shadow" to the Web ? C++ to JavaScript/Canvas via Emscripten (April 4, 2012.)
What it does essentially is to open up the Web platform to all sort of games and other C/C++ popular libraries that can be trans-compiled as a subset of JavaScript called asm.js that modern browsers can compile and run much more efficiently than our standard JS code.