Table 2: Runtime comparison of the implementations: C++ on Pentium $^{\scriptsize\textregistered}$ 4 (3 GHz), IDL on Xeon (2.8 GHz). The last column shows a rough estimate of the runtime of the IDL implementation on the slower Pentium $^{\scriptsize\textregistered}$ machine using the conversion factor 1.15.
Job C++ IDL IDL (normalized)

Simulated images 112 min 528 min $\approx$ 607 min

GOODS images 55 min 664 min $\approx$ 764 min

**Table 2:** Runtime comparison of the implementations: C++ on Pentium $^{\scriptsize\textregistered}$ 4 (3 GHz), IDL on Xeon (2.8 GHz). The last column shows a rough estimate of the runtime of the IDL implementation on the slower Pentium $^{\scriptsize\textregistered}$ machine using the conversion factor 1.15.
Job	C++	IDL	IDL (normalized)
Simulated images	112 min	528 min	$\approx$ 607 min
GOODS images	55 min	664 min	$\approx$ 764 min

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