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• In absolute terms, GALFIT can fit a single galaxy (200×200 pixels) with Sérsic function, in ~30 – 60 seconds on a Pentium 833 MHz (over half this time is spent doing convolution). In relative terms, it’s at least 20 times faster than GIM2D, and sometimes over 100 times. For other benchmarks, please see Peng, Ho, Impey, & Rix 2002, AJ, 124, 266.
