>>1522663What you refer to as the "4chan ID" is actually the UNIX timestamp—seconds since 1980. If you sort them using the filename, they will appear in the order you downloaded them if you browse fast boards exclusively.
Consider the following experiment:
1. go to /vt/
2. browse a random thread
3. download a few pictures from the newest posts
4. wait ~1 minute
5. return to the catalog and browse any thread
- repeat steps 2 and 3
The pictures should appear in order.
Now, perform the same experiment but download the image attached to the sticky first.