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Recent versions of calibre run like a dog on my laptop
I've had Calibre running on the same Linux laptop since 2019 or so...but recent versions have started to make it chug just by virtue of being open. I can't recall exactly when it started, because I rarely spend much time in the app beyond pulling in two or three newly-purchased books and cleaning up the metadata, but it feels like around the time of the last major release? Either that or whenever the new bookshelf view was added (even though I don't use it).
I'm afraid I don't have much to show by way of performance except this screenshot of htop running. We can see calibre is at 100% cpu (pegging one of my cores I assume), despite my having just opened the app and let it sit there for about two minutes w/o doing anything.
The laptop was rebooted recently, so it's not causing a huge drain at the moment, but on a previous occasion the memory usage was also quite high when doing basic operations within the GUI, to the point that it soft-locked my laptop more than once until the systemd-oom killer kicked in. Trying to shut the app down in low-memory states was also a fool's errand: it would simply hang there for minutes on end until I issued a `killall calibre` command in the terminal.
Is there anything I can do to troubleshoot this? I really don't feel like it used to be this bad.
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