From: Konrad Meyer <konrad@...>
Date: 2007-10-28T17:18:18+09:00
Subject: Re: NOT reading an entire file into memory

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Quoth 7stud --:
> Konrad Meyer wrote:
> > Quoth 7stud --:
> >> #create a data file containing:
> >>=20
> >>     else
> >>       break
> >>     end
> >>=20
> >>   end
> >> end
> >=20
> > IO#each_with_index and IO#readline are probably the same internally, so=
=20
> > the
> > real answer here is that NO, IO#readline is NOT the same as
> > File.read.split('\n'), that's IO#readlines.
> >
>=20
> The real question is: does readline do any buffering?  What about=20
> each()?  If a file has ten lines in it, does ruby access the file ten=20
> times?  Or, does ruby read some reasonable amount of data into a buffer?

Performance isn't everything. If it was, you wouldn't be using ruby. The id=
ea=20
is that this will work "well enough", shouldn't take too much thought on th=
e=20
programmer's behalf, and doesn't load the entire (huge) file into ram.

=2D-=20
Konrad Meyer <konrad@tylerc.org> http://konrad.sobertillnoon.com/

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