From: Peter Hickman <peter@...>
Date: 2002-03-07T22:32:42+09:00
Subject: Re: file reading impossibly slow?

Your file reading is a bit non-ruby, so to speak, you need to get the 
hang of itterators.

t1 = Time.now
count = 1
File.open("data.txt") {|file|
    file.each_line{|line| count += 1}
}
puts Time.now - t1
puts count

Using the each_line iterator from the file class removes the need for a 
eof test. This should run quite a bit faster.

Ron Jeffries wrote:

>The file ran in 2229.656 seconds, or 37 minutes. Smalltalk was 3 minutes.
>Program was
>
>t1 = Time.now
>count = 1
>File.open("data.txt") { | file |
>	while (!file.eof?)
>		line = file.gets
>		count += 1
>	end
>}
>puts Time.now - t1
>puts count
>
>Got the wrong answer, too. Should have said count = 0 ;->
>
>What's a guy to think? That seems awfully slow ...
>
>Ronald E Jeffries
>http://www.XProgramming.com
>http://www.objectmentor.com
>I'm giving the best advice I have. You get to decide whether it's true for you.
>