We can achieve significant performance speed enhancement with NumPy over native Python code, particularly when our computations follow the Single Instruction, Multiple Data (SIMD) paradigm. However, it is also possible to unintentionally write non-optimized code with NumPy.
In the next few recipes, we will see some tricks that can help us write optimized NumPy code. In this recipe, we will see how to avoid unnecessary array copies in order to save memory. In that respect, we will need to dig into the internals of NumPy.
First, we need a way to check whether two arrays share the same underlying data buffer in memory. Let's define a function aid() that returns the memory location of the underlying data buffer:
>>> import numpy as np
>>> def aid(x):
# This function returns the memory
# block address of an array.
return x.__array_interface__['data'][0]Two arrays with the...