micropython/tests/internal_bench/arrayop-3-bytearray_inplace.py

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# 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)