From: Yohanes Santoso <ysantoso@...>
Date: 2002-11-09T02:00:22+09:00
Subject: Re: File::read Performance

"Daniel Schnell" <daniel.schnell@embeddedware.de> writes:

> Hi there,
> 
> if I make the following implementation of the command "cp" with ruby, the
> read Performance is really bad. Can I improve it in any way ?

First, make sure you're running ruby 1.6.7 (or is it 1.7) that has an
improved IO#read and IO#write.

Secondly, if you still think IO#read and IO#write are still too slow,
use IO#sysread and IO#syswrite.

Sometimes ago, I published a benchmark of ruby reading using
IO#read, and IO#sysread, againsts UNIX's cat and perl's read.

The result was IO#sysread was slightly faster than cat which was
faster than perl's read which was faster than IO#read. Read more at:
http://rubytalk.org/42780


YS.