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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.
@DrAzzy
In the webIDE options, change the minifier to closure instead of... whatever the default is.
That minifier gets rid of all the newlines, so Espruino has to buffer the whole mess, AND the results of executing it. So it stops working at about half-full.
The ESP8266 doesn't have all that much RAM, and on Espruino, code is stored in RAM (since code is fully manipulatable - this is javascript). There is work ongoing to improve matters here - there are versions in testing with 1600 jsvars available, and work is being done (see the other threads in this section) on storing code in flash.