From: "Mauricio Fernández" <mfp@...>
Date: 2005-07-21T18:33:36+09:00
Subject: Re: YAML::Store - fast read, slow write

On Thu, Jul 21, 2005 at 04:45:22PM +0900, Bill Kelly wrote:
> I have a 635K YAML file I'm using as a flat file database
> with YAML::Store.  It's taking about 13 seconds to do a
> #transaction on the file - but I was surprised to see that
> the file is loaded in 1 second, and that it takes 12 seconds
> to write the file back out.
[...]
> Anyway I was wondering if the slow write speed was a known
> issue / expected behavior?  I'm running it with -rprofile,
> but it's still going... <grin>  I'll check the results of
> that when I get up tomorrow.... 

syck's emitter is known to be slow.

PS: it doesn't really help you in this case, but next
time you want to profile something, take a look at
http://raa.ruby-lang.org/project/ruby-prof/ which is massively faster
than the set_trace_func-based one.

-- 
Mauricio Fernandez