High CPU usage (20 %) copying files

[paulmenzel]

Intel Kaby Lake laptop Dell XPS 13 9360 (i7-7500U) with Debian sid/unstable and ntfs-3g 1:2022.10.3-5

Copying files from a USB flash drive to an external USB rotating disk, both formatted with NTFS, the CPU usage is quite high:

$ ps aux | grep mount.ntfs
root      151432 19.0  0.0   7580  2256 ?        Ds   21:47   1:58 /sbin/mount.ntfs /dev/sdb1 /media/myuser/usb-disk -o rw,uhelper=udisks2,nodev,nosuid,uid=5272,gid=5272,windows_names
myuser   165696  0.0  0.0   7028  2392 pts/10   S+   21:57   0:00 grep --color=auto mount.ntfs
$ ps aux | grep mount.ntfs
root      151432 19.2  0.0   7580  2256 ?        Rs   21:47   2:01 /sbin/mount.ntfs /dev/sdb1 /media/myuser/usb-disk -o rw,uhelper=udisks2,nodev,nosuid,uid=5272,gid=5272,windows_names
myuser   165726  0.0  0.0   7028  2312 pts/10   S+   21:57   0:00 grep --color=auto mount.ntfs
$ ps aux | grep mount.ntfs
root      151432 19.3  0.0   7580  2256 ?        Rs   21:47   2:01 /sbin/mount.ntfs /dev/sdb1 /media/myuser/usb-disk -o rw,uhelper=udisks2,nodev,nosuid,uid=5272,gid=5272,windows_names
myuser   165768  0.0  0.0   7028  2360 pts/10   S+   21:57   0:00 grep --color=auto mount.ntfs

At least I’d have expected less than 5 %.