My general take on this is: If you're modifying C source files or otherwise making big changes, you're more than capable of setting up a dev environment (which with 'Bash on Windows' or Linux is basically copy/pasting one command in a terminal). In fact trying to compile and debug your code using a web compiler would be amazingly slow, painful and frustrating, plus you'd waste loads of CPU time on @JumJum's server (which he's providing for free) doing hundreds of builds.
On the other hand, if you want a custom build with some modules built-in, or you need to disable something and enable something else, EFEU is really nice to use and way faster than doing your own dev environment.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
My general take on this is: If you're modifying C source files or otherwise making big changes, you're more than capable of setting up a dev environment (which with 'Bash on Windows' or Linux is basically copy/pasting one command in a terminal). In fact trying to compile and debug your code using a web compiler would be amazingly slow, painful and frustrating, plus you'd waste loads of CPU time on @JumJum's server (which he's providing for free) doing hundreds of builds.
On the other hand, if you want a custom build with some modules built-in, or you need to disable something and enable something else, EFEU is really nice to use and way faster than doing your own dev environment.