From: Brian Candler <B.Candler@...>
Date: 2003-05-12T20:38:18+09:00
Subject: Re: efficiency advice needed

On Mon, May 12, 2003 at 06:40:06PM +0900, Robert Klemme wrote:
> > > If you want to append to a string, using "<<" or "concat" is better
> than
> > > "+=" since "+=" creates a new instance every time.  You can verify it
> like
> > > this:

And even better is to preallocate the source string: i.e.

  space = " "
  ... do
    a << space * n
  end

is faster than

    a << " " * n

because the latter generates a new string object (containing one space) each
time round the loop.

Cheers,

Brian.