In such restricted cases awk might or not be a better bet.
awk -F'[[:space:]]+' 'BEGIN { OFS="\t" } { print $3, $6, $7 }' infile +> outfile
Makeshifts last the longest.
In reply to Re: Optimizing slow restructuring of delimited files
by Aristotle
in thread Optimizing slow restructuring of delimited files
by iKnowNothing
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