I am currently working with HASYv2 dataset which contains the hasy-data directory with 168.233 images of size 32px x 32px. I just wanted to copy that directory with Caja, but I skipped this after about 5 minutes (and Ubuntu told me it would take another 10 minutes).
Copying the files with
cp -a source_dir target_dir took less than 9 seconds.
However, creating a tar.bz2 archive, copying the archive, extracting the files was done within about 15 seconds (everything combined).
Why is that the case?
(Side questions: When I press Ctrl+C, Ctrl+V to copy files within Caja the copying process is started by Caja, right? Does it make sense to internally use a similar procedure if many files are about to be copied?)