Brian Tarricone authored Oct 17, 2024 and Alexander Schwinn committed Oct 17, 2024

Since we have to read both the source (again) and destination files in
order to verify them, there's no reason to calculate a checksum: we can
simply compare the file contents with each other.

Even faster might be to stop using g_file_copy(), and instead "manually"
copy the file so we can feed the source bytes into a checksum generator
on the fly, without having to re-read the source file again at the end.
We could even chunk the file and generate a checksum per chunk in
parallel on different threads, and then compare the chunk checksums at
the end.

But this should give us a nice speedup, and is much, much simpler.

Closes #1471
MR !557