Faster characterization

[escowles]

Running FITS takes a very long time (up to 80% of the time to ingest a TIFF is spent doing characterization). Explore alternatives such as:

• Running JHove standalone
• Running a lightweight characterization service first (e.g., ImageMagick's identify), and then running FITS on a low-priority queue

[jpstroop]

Whether JHOVE or full-blown FITS, running the characterization as a service so that we're not spinning up the JVM every time would probably give us a good boost.

[escowles]

I think this issue is mostly resolved with ucsdlib/ansible-role-fits#2 — disabling Tika/Tesseract has improved performance, now averaging about 10 seconds per file.

Running a FITS/JHOVE service might be a small improvement on that, however, and I agree it's worth looking into.