Speed up qstr loading by using the stack to store a temporary string instead of the heap.
Speed up qstr loading by using the stack to store a temporary
string instead of the heap.

adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/micropython,adafruit/micropython