Arduino/esp8266/micropython/tests/bench/arrayop-3-bytearray_inplace.py

# Array operation
# Type: bytearray, inplace operation using for. What's good about this
# method is that it doesn't require any extra memory allocation.
import bench

def test(num):
    for i in iter(range(num//10000)):
        arr = bytearray(b"\0" * 1000)
        for i in range(len(arr)):
            arr[i] += 1

bench.run(test)