Adding to the front of a line
matthew.flaschen at gatech.edu
Tue Jan 20 18:27:24 UTC 2009
Florian Diesch wrote:
> Matthew Flaschen <matthew.flaschen at gatech.edu> wrote:
>> Cameron Hutchison wrote:
>>> If the file is not very big, looping in bash will work ok, but once you
>>> start dealing with larger files, you really want to use other tools than
>>> bash loops.
>> I doubt you'll get any noticeable performance difference. The bash
>> script I gave does not fork any external processes.
> But shell code is interpreted while sed is native code.
> Using "seq 1 1000000 " as input the shell codes needs about 18s here
> while sed needs about 7s.
You're right. I tested and the difference on my machine was far more
than I expected too.
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