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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.
@Gordon
Is that
process.memory()that you put what you get right after uploading?It's possible that it's not the code that's using up memory, but stuff that it allocates (arrays/etc?)
Having said that, 20k of code is quite a lot for a module. At the moment, to load it Espruino ends up having to store the same thing 3 separate times (momentarily), so that's ~60kB, which is going to end up being too much.
It might be worth looking at http://www.espruino.com/Performance for some ideas about how to save memory/get your module size down.
You should definitely try and avoid stuff like
getFoo = function() { return foo; }though (if you have them) - it wastes space and slows execution down quite a lot on Espruino...