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Re^2: Efficient way to sum columns in a file

by Roy Johnson (Monsignor)
on Apr 13, 2005 at 20:40 UTC ( #447580=note: print w/ replies, xml ) Need Help??


in reply to Re: Efficient way to sum columns in a file
in thread Efficient way to sum columns in a file

Although still slower than having separate variables for each column, this was a bit faster (and shorter) than your middle test:

time perl -nle'my $i=0;$a[$i++]+=$_ for (split/,/);END{print join "\t" +, @a}' numbers.csv
At only about 50% slower than the fastest solution, its brevity and adaptability might recommend it.

Caution: Contents may have been coded under pressure.


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