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Re^2: [off-site] Bash + Perl oneliners basics

by Anonymous Monk
on Mar 17, 2005 at 09:50 UTC ( #440318=note: print w/replies, xml ) Need Help??


in reply to Re: [off-site] Bash + Perl oneliners basics
in thread [off-site] Bash + Perl oneliners basics

I bet mine runs with 1/4th the CPU.
Except that for small to medium sized files, it doesn't matter and the additional programming (and debugging) time dwarves the running time. And for really long files, your program might actually be slower, or even fail to finish as it will consume significant amounts of memory. The elegant one-liner, consisting of several tools that do one thing well won't suffer from memory problems, as 'sort' knows when to switch to using temporary files.

Having said that, I would have written the one-liner as:

awk '{print $6}' /var/log/httpd/access_log | sort | uniq -c | sort -n | head -10

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[Discipulus]: dear brother karl has "Furthermore I consider that Donald Trump must be impeached as soon as possible" in his sig
[erix]: ah, thanks Discipulus
[1nickt]: erix perhaps you could kindly point out your technique to roho and everyone will be happy.
[Discipulus]: but i'm also animalist, so i' hirted by 1nickt's sig: The way forward always starts with a mammal test... grin..
[erix]: I might if I did remember. It's probably somewhere in the site docs
[uhClem]: I don't favor that sort of thing around here but the place for our politics is wherever we live.
[uhClem]: And besides, the objection to it was off-topic.
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