Question: One observation about Maple run time ...

Hi all, Did you discover the same mysterious thing about the command execution time in Maple? Here is my observation: If I have been using this session for a long time and then if I issue a long-processing command, such as simplification of a very complicated expression, etc. After a while, Maple will get into "steady state": it keeps running and running, without consuming more memory and showing more activity, the time even counts towards 10000 second, etc. If based on this, I think the expression is really too complicated for it to simplify, then I am wrong. After rebooting the PC, and relaunch Maple, and start the same command to simplify the same expression, it generated a result within 15 minutes, successfully... Why is it so strange? I cannot keep rebooting my PC, right?
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