Re: [PHP-DEV] Re: [PHP3] VBS/Perl/PHP Performance Test From: Andi Gutmans (andi <email protected>)
Date: 12/24/99

At 08:19 PM 12/23/99 -0600, Andrei Zmievski wrote:
>On Thu, 23 Dec 1999, Rasmus Lerdorf wrote:
> > The preg_replace() function should be quite a bit faster. Try that
> > instead. The hsregex library is starting to show its age. The PCRE
> > library is quicker.
>
>Yes, the actual regex matching code is quite faster. The code that does
>replacement though was mostly taken from ereg_replace(), with some
>modifications for the PCRE stuff. I don't know right now how it can be
>optimized more.

I think the main reason why Perl is so much faster than ASP & PHP in that
benchmark is because regular expressions are part of the language syntax.
Thus the regex's are compiled at compile time. In PHP, although there is a
regex cache for PCRE regex's there is more of an overhead as they aren't
embedded as part of the language.

Andi 

---
Andi Gutmans <andi <email protected>>
http://www.zend.com/

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