From: Jim Freeze <jim@...>
Date: 2003-04-11T18:40:13+09:00
Subject: Re: Need IO Optimization help

On Friday, 11 April 2003 at 17:32:17 +0900, Brian Candler wrote:
> On Fri, Apr 11, 2003 at 03:10:27AM +0900, Jim Freeze wrote:
> > Below are the results I get from your benchmarks. I added
> > the last test which seems to be the fastest, AND is what
> > I was doing in my tests. To bad perl is 50% faster.
> > 
> > Can this be spead up with a C routine?
> 
> I did some profiling of a very similar program, results posted at
> http://blade.nagaokaut.ac.jp/cgi-bin/vframe.rb?key=-pg&cginame=namazu.rb&submit=Search&dbname=ruby-talk&max=50&whence=0
> 
> Conclusion: I can see no obvious bottlenecks. When you drill down and work
> out how much time is spent in object creation and garbage collection, file
> reading and scanning etc. it seems all pretty well balanced to me. The
> reading and breaking-into-individual-lines accounts for 1.09 seconds out of
> 2.53 seconds
> 

I did some profiles as well and came to the similar conclusions for these
simple tests. I'm not sure that if I dropped to rb_io_readline (or
whatever), that it would go any faster. However, I plan to repeat the
tests with 'code' inside the loop to see if Ruby catches up with Perl 
when actual work is being done.


-- 
Jim Freeze
----------
Never put off till tomorrow what you can avoid all together.