Memory Leak: Massive RAM increase due to repeated FieldContainer.imshow()

[adtzlr]

In an interactive session. It seems that the screenshot method, especially with nonlinear_subdivision > 1, eats the RAM. Unfortunately, we can't do much about it.

import felupe as fem

mesh = fem.Circle(n=12).add_midpoints_edges()
plotter = mesh.plot(off_screen=True)
img = plotter.screenshot()

import matplotlib.pyplot as plt

plt.imshow(img)

Even for such simple meshes and without nonlinear_subdivision > 1, only Restart Kernel helps to free the memory in an interactive Python session after multiple screenshot calls.

[adtzlr]

this could be related to pyvista/pyvista#2252

[adtzlr]

Hmm. This seems to be platform dependent. On Windows, the increase of RAM usage is notable but not that massive as on Linux.