Cache first row and column of pixels from neighbors. #32
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In a large prominence run, this can remove the need for 3/4 of the disk reads. Also iterate east to west to get more cache hits, as we read our eastern neighbor for pixels.
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In a large prominence run, this can remove the need for 3/4 of the disk reads.
Also iterate east to west to get more cache hits, as we read our eastern neighbor for pixels.