[Cross-Posted] ipyfilechooser + ipython_blocking = large memory leak

[bryceschober]

When I:

1. Run my example from https://github.com/bryceschober/ipyfilechooser_blocking_example in Jupyter or VS Code or even the binder.org link on that example repository.
2. Choose to run all cells instead of one at a time.
3. Observe a large continuous memory leak until you actually select a file and click select, and then memory usage returns to normal.

[bryceschober]

See also crahan/ipyfilechooser#36

[dokempf]

FWIW, the memory leak can be observed in the absence of any additional libraries. In this minimum example, execution blocks for 100 seconds and we can see the memory consumption grow: