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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.
@bluebie
@tve NodeMCU and Arduino default to 9600, so do the official espruino boards. I'm uploading the 9600baud espruino firmware now and it takes about ten minutes. More of a go make some tea kind of wait than a go have a nap kind of wait.
It sounds like you must have another bottleneck than serial connection if your uploads are taking that long, even at 9600bd a kilobyte takes about one second to transfer, so a couple kb should be done in a couple seconds!