String concatenation performance

[Duncan Booth]

Cristian.Codorean wrote:

> I was just reading a "Python Speed/Performance Tips" article on the
> Python wiki
> http://wiki.python.org/moin/PythonSpeed/PerformanceTips
> and I got to the part that talks about string concatenation and that
> it is faster when using join instead of += because of strings being
> immutable.

... snip ...

> So what am I doing wrong ?
> 

What you are doing wrong is failing to search the newsgroup to see if
anyone else has asked the same question within the last few days. In
particular see the thread titled 'which is better, string concatentation
or substitution?' message <445ec45e$0$1965$c3e8da3 at news.astraweb.com> 

http://groups.google.co.uk/group/comp.lang.python/browse_frm/thread/2d060eb94730bedb/06412fc21aa1fe8c?#06412fc21aa1fe8c