Why Can't Objgraph Capture The Growth Of Np.array()?
See the code: import objgraph import numpy as np objgraph.show_growth() j = 20 y = [] for i in range(5): for l in range(j): y.append(np.array([np.random.randint(500),np
Solution 1:
I'm not that familiar with objgraph
specifically, but I think the same issue applies to other Python heap analysis tools such as heapy
.
Numpy arrays are implemented in C, and do their own reference counting by internally calling Py_INCREF
and Py_DECREF
. As such, they are not tracked by the Python garbage collector. Tools like heapy
and (presumably) objgraph
use the Python garbage collector to track references to objects, so as a result numpy arrays are invisible to them.
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