"...It looks like the more efficient choice would be to use unpack..."

I'm not so sure. As you wrote:

$ perl test.pl
              Rate unpack substr  split
unpack 171232877/s     --   -23%   -31%
substr 223713647/s    31%     --   -10%
split  248138958/s    45%    11%     --

[download]

Ergo:

karls-mac-mini:monks karl$ perl -e 'printf ("%.1f\n", 248138958/171232
+877);'
1.4

[download]

As i wrote at Re^6: Question on Regex:

"...use cmpthese, the results are sorted from slow to fast..."

Sorry in advance if i did something wrong missed something.

Best regards, Karl

«The Crux of the Biscuit is the Apostrophe»

perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help

In reply to Re^2: Faster and more efficient way to read a file vertically by karlgoethebier
in thread Faster and more efficient way to read a file vertically by Anonymous Monk

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