setFontCustom bitmap format vs vertical_byte:true - GT24L24A2Y fontchip in F07 fitness tracker

Yes, memory usage is high, this is actually with code uploaded to ram so it can be better. Still before trying to create the font, ther are like ~500 variables free so was hoping this could work. This is more like stress test of Espruino memory, not that I couldn't do it better. There are quite a lot of flat strings, more than I expected, any way to find them? Can it be the javascript code that is uploaded?

I guess the main thing from this is that it would be nice to get non-flat string from the array buffer somehow so it is not need to call E.toString on large arrays.

IIRC the defrag won't move flat strings - I was concerned about what you'd mentioned earlier - moving stuff that you had a pointer to.

Maybe it could be some flag to E.defrag() to force it when called explicitly. I can handle that in my own code if I can call it myself with that flag when needed, now sure how much espruino internal usage of flat strings would break (if there is any).