When a pydev project includes an import of graph_tool, Eclipse consumes very high cpu cycles by percentage. Open system monitor. Create the project. Open the source in the editor. On a new line, type "g.". The Eclipse java process increases to a very high percentage of cpu cycles. This might take a minute to occur. Once it happens, it continues until Eclipse is closed. The Code Analysis never seems to complete. When this problem occurred in a VirtualBox, typing became so slow as to be useless. Running in a non-virtual environment, the entire system became slow. Source code in pydev project module: from graph_tool.all import * g = Graph() v1 = g.add_vertex() v2 = g.add_vertex() e12 = g.add_edge(v1, v2) print(g) g.add OS: Ubuntu 18.04 Eclipse: Version: 2020-06 (4.16.0) Build id: 20200615-1200 PyDev for Eclipse 7.7.0.202008021154 org.python.pydev.feature.feature.group Python interpreter: python3.8 in venv (created with pipenv) graph_tool requires matplotlib, numpy, and scipy in order to prevent warnings, but these might not be required to cause the problem. <https://nabble.skewed.de/file/t496263/processes-detail-cr-2k.png> <https://nabble.skewed.de/file/t496263/resources.png> -- Sent from: https://nabble.skewed.de/