I'm using a random (near the beehive) image from a 383L (5.45um pixels, 3362x2537 pixels 16bit = 17MB) to act as a performance test. The Pentax is a 4" refractor at 670mm native focal length giving a arcsec/pix of 1.66"/pix. The ODroid C2 is a quad core ARM v8 (64bit) with 2GB ram. I'm using a USB2.0 SSD to hold the full set of astrometry.net indices (~32GB).
Astrometry has been setup without in parallel option (the C2 only has 2GB RAM) and you can see from the command line the parameters set - including downsample 4. It's funny that most of the time is in creating the output annotated plots. Successive runs are --overwrite so the solving starts from scratch each time. I was using astrometry with a 4 minutes solve so both runs have the same caching potential from a filing system perspective.
Timed, with annotated plot outputs (top time) = 4 minutes (yikes!)
Timed, without annotated plot outputs (bottom time) ...... 14 seconds (!!!) using one core.
![]()
Astrometry has been setup without in parallel option (the C2 only has 2GB RAM) and you can see from the command line the parameters set - including downsample 4. It's funny that most of the time is in creating the output annotated plots. Successive runs are --overwrite so the solving starts from scratch each time. I was using astrometry with a 4 minutes solve so both runs have the same caching potential from a filing system perspective.
Timed, with annotated plot outputs (top time) = 4 minutes (yikes!)
Timed, without annotated plot outputs (bottom time) ...... 14 seconds (!!!) using one core.
