The interpreter may be boosted by a just-in-time (JIT) compiler, which translates some of the byte code into native code instructions at runtime. JIT compilers sometimes introduce runtime startup ...

At first, Emscripten sounds like the punch line to a tech joke: a compiler that converts C/C++ code into Asm.js, a subset of JavaScript that can then run via a Web browser or in the Node.js framework.

Many programming languages require a compiler to compile them to machine-readable code, but Web browsers can read JavaScript with no compilation required. However ...