From: Brian Candler <B.Candler@...>
Date: 2003-04-14T19:03:16+09:00
Subject: Re: Need IO Optimization help

On Mon, Apr 14, 2003 at 05:57:06PM +0900, Robert Klemme wrote:
> > well I suppose his point is that not using Fixnum you can have
> > Counter.succ!, without the need for an assignment , written directly
> > in C,  possibly faster..
> > (and though possibly low level optimized as in "inc reg" vs "add
> > reg,1"  )
> 
> Hm, that would require some code duplications since you want this counter
> to behave similarly like Fixnum+ which means the type of the internal
> value vepresentation must be changeable etc.  I find this quite ugly and I
> don't know whether the performance improvement would justify this
> ugliness.

There wouldn't be any (noticeable) performance improvement anyway.

It's the method dispatch which is IMO the main overhead, not the actual
adding of 1 to a Fixnum, nor the assigning of the result to a local
variable.

Brian.