optimized truncating ${fPath} + optimized pOrder + improved documenta… #2
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…tion
truncating ${fPath}: coproc pRead now leaves a 1-line "buffer" between what is getting deleted and what is going to be read next
pOrder: coproc pOrder now saturated the pipe buffer (64k, ~10000 vlues) and then (as needed) only does brace expansion on 1000 values at a time to add to the nOrder pipe
use /dev/shm if available, otherwise /tmp fix regression in nLinesAuto getting read/write position make truncating the start of the data file only happen once every $nProcs reads
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…tion
truncating ${fPath}: coproc pRead now leaves a 1-line "buffer" between what is getting deleted and what is going to be read next
pOrder: coproc pOrder now saturated the pipe buffer (64k, ~10000 vlues) and then (as needed) only does brace expansion on 1000 values at a time to add to the nOrder pipe