From: Jano Svitok <jan.svitok@...>
Date: 2007-08-21T07:34:26+09:00
Subject: Re: # of lines in a file

On 8/21/07, blufur <blufur@gmail.com> wrote:
> is there built-in method to determine the number of lines in a file?
>
> i tried file.readlines.length but it is very slow (dealing with files
>  > 1 million lines)

if on unix:
`wc -l #{filename}` or similar (I don't remember the exact syntax for wc)

otherwise:

try counting \r\n or \n. Read file in a loop, counting the occurences.
There was a thread recently how to process a file as fast as possible
-- search the archives.