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• #2
Yes, that sounds about right. Espruino doesn't actually use heap at all, and I don't believe the softdevice does either - since stack grows into heap it's basically no heap and 16k stack.
That's playing it super safe though, so at some point I may raise the amount of JSVars and reduce the available stack a little.
Because the interpreter parses as it runs, it does tend to use a little more stack - especially with recursion. Generally it's not that bad though, and there are checks in place to try and ensure that JS code execution errors before the stack is exhausted.
I'm trying to understand the memory management of Espruino.
Puck has 64k RAM of which ~11 kbyte are reserved for softdevice and ~37kbyte are reserved at compile time (data + bss). In turn 32kbyte of bss are the 2000 JSVars. Therefore 16k are left for heap and stack.
Heap seams to be 8k (0x2000bcd0 - 0x2000bcd0).
Stack steams to be 16k, 8k shared with heap (0x2000bcd0 - 0x20010000).
Are my calculations correct? Does any one know how much stack and heap is occupied at runtime?