One suggestion: if each record has more than 16 fields, you might find slightly better performance with 
my @row = split /\t/, $_, 17;

[download]
which tells perl to split into at most 17 fields (0 to 15, leaving the trailing data in 16).

In reply to Re^2: Performance challenges by Eimi Metamorphoumai
in thread Performance challenges by Anonymous Monk

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