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DNSB · Yesterday, 04:33 PM

Interesting. I did some testing on my desktop and I did not notice a noticeable slowdown until I reached greater than 80,000 subdirectories tested on Windows 11 OS Build 26220.7934 (NTFS), OpenSUSE Tumbleweed (btrfs) & Ubuntu 25.10 (ext4) and Arch (ZFS) mounted using ZFSBootMenu. Given that my main calibre library which current has ~17,210 books contains 51,624 files and 21,514 folders (I do not make heavy use of data folders otherwise those number would be higher).

Note that all those tests were done on virtual machines just to keep the playing field more or less level.

What you want would require a major rewrite of calibre and make new libraries incompatible with other versions of calibre.

Yesterday, 04:33 PM	#2
DNSB Bibliophagist Posts: 50,700 Karma: 178402706 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Interesting. I did some testing on my desktop and I did not notice a noticeable slowdown until I reached greater than 80,000 subdirectories tested on Windows 11 OS Build 26220.7934 (NTFS), OpenSUSE Tumbleweed (btrfs) & Ubuntu 25.10 (ext4) and Arch (ZFS) mounted using ZFSBootMenu. Given that my main calibre library which current has ~17,210 books contains 51,624 files and 21,514 folders (I do not make heavy use of data folders otherwise those number would be higher). Note that all those tests were done on virtual machines just to keep the playing field more or less level. What you want would require a major rewrite of calibre and make new libraries incompatible with other versions of calibre. Last edited by DNSB; Yesterday at 04:37 PM.