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Execution
speed
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Current rule
of thumb: ~1Mpix/s per GHz at high galactic
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latitude
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Turns out to
be I/O-limited in some cases: might be useful to use
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different
devices for reading and writing data
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In crowded
fields, limited by source-density: 500+ extractions/s per GHz
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Compile with
the right optimization options
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Avoid gcc if
a more efficient compiler is available (e.g. Digital or Intel
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compilers)
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On Linux,
better use the RPM archive from TERAPIX
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SExtractor is
not parallelized yet
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Avoid
memory-swapping
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Memory usage
can go out of control in large, crowded fields!
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