Simple addition results in warnings "Argument isn't numeric" whenever an empty string is there for a field that is nevertheless numeric.

And your code warns for the string "abc" in a numeric field. You didn't perform validation, so neither did I.

savings from converting Unix time from 10-character strings to 4-byte integers are significant.

A measly 16% savings. 

$ perl -MDevel::Size=total_size -E'my @a; for (1..3000*6000/10) { my $
+item = "1234567890"; push @a, $item; } say(total_size(\@a))'
87588692

$ perl -MDevel::Size=total_size -E'my @a; for (1..3000*6000/10) { my $
+item = "1234567890"; $item = 0+$item; push @a, $item; } say(total_siz
+e(\@a))'
73188692

[download]

Anyway, the question was how to make array processing faster

So why are you complaining about a little extra memory.

In reply to Re^3: Unpacking and converting by ikegami
in thread Unpacking and converting by dwalin

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