[dokuwiki] even faster header stuff (was: Re: darcs changes)

On Wed, 12 Apr 2006 10:19:32 +0100
Chris Smith <chris@xxxxxxxxxxxxx> wrote:

> Andreas Gohr wrote:
> > -------------------------------------------------------------------
> > -- Tue Apr 11 20:27:21 CEST 2006  Andreas Gohr
> > <andi[at]splitbrain.org>
> >   * releaxed header syntax
> > -------------------------------------------------------------------
> > --
> What is the status of the header changes after this last patch?

I just discovered a much simpler and faster method: strspn()

The code now boils down to:

$level = 7 - strspn($match,'=');
if($level < 1) $level = 1;
$title = trim($match,'= ');

I just did some profiling for 5000 parsed headlines:

Your method using preg_split and strlen:

Time Taken      Number of Calls Function Name
0.0336592736    5000            preg_split()
0.0049825367    5000            strlen()

Using just strspn:

Time Taken      Number of Calls Function Name
0.0066876130    5000            strspn()

I didn't bother to test my old method using the lookup array, it was
probably much much slower than both of the above.

Andi

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