[Foundation-l] Wikitext isn't a programming language, but...

[David Strauss]

I'm certainly no expert for the MediaWiki parser, but you could take a
microtime() from the start of parsing and periodically check time
elapsed. With anything beyond the allotted parsing time, the template
would return either nothing or a warning.

David Gerard wrote:
> On 19/01/07, David Strauss <david at fourkitchens.com> wrote:
> 
>> #loop is a problem. If this template language is Turing-complete, it can
>> be used to run infinitely long programs. That is a huge avenue for abuse.
>> Then again, there could be an execution limit to the parsing of a template.
> 
> 
> We have one real-life example of this, of course, in the recent
> template on es: Wikipedia that took 20 seconds to run and caused some
> annoyance on wikitech-l ... how feasible are execution time limits in
> practice, what's a reasonable limit (knowing people are going to push
> as close to it as they can) and what's a reasonable failure mode
> (knowing people are going to push as close to it as they can)?
> 
> 
> - d.
> 
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